diff --git a/.github/workflows/build-deb.yml b/.github/workflows/build-deb.yml
index 0fd24711c..b5612b76d 100644
--- a/.github/workflows/build-deb.yml
+++ b/.github/workflows/build-deb.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        backend: [nvidia, metax]
+        backend: [nvidia, metax, ascend]
 
     steps:
       - name: Checkout repository
diff --git a/packaging/debian/build-helpers/Dockerfile.deb b/packaging/debian/build-helpers/Dockerfile.deb
index dfd9dbb1d..e285000a0 100644
--- a/packaging/debian/build-helpers/Dockerfile.deb
+++ b/packaging/debian/build-helpers/Dockerfile.deb
@@ -1,21 +1,26 @@
-# Multi-stage Dockerfile to build Debian packages for FlagCX
+# Unified Dockerfile to build Debian packages for FlagCX
 # Supports multiple backends via build arguments
 
 ARG BASE_IMAGE
 ARG BASE_IMAGE_VERSION=latest
 
-FROM ${BASE_IMAGE}:${BASE_IMAGE_VERSION} as builder
+FROM ${BASE_IMAGE}:${BASE_IMAGE_VERSION}
 
 ARG VENDOR
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Install Debian packaging tools and build dependencies
+# Note: some base images (e.g. Ascend CANN) may lack basic build tools,
+# so we explicitly install all Build-Depends from debian/control here.
 RUN apt-get update && apt-get install -y \
     debhelper \
     devscripts \
     dpkg-dev \
     fakeroot \
     lsb-release \
+    g++ \
+    make \
+    cmake \
     chrpath \
     patchelf \
     nlohmann-json3-dev \
@@ -41,11 +46,7 @@ RUN DEB_BUILD_PROFILES="pkg.flagcx.${VENDOR}-only" \
       find /workspace -name "*.log" -exec echo "=== {} ===" \; -exec cat {} \; 2>/dev/null || true; \
       exit 1; }
 
-# Collect built .deb files
+# Collect built .deb files into /output
 RUN mkdir -p /output && \
     find /workspace -maxdepth 1 -name "*.deb" -exec cp {} /output/ \; && \
     ls -lh /output/
-
-# Output stage: minimal image with only the .deb files
-FROM alpine:latest as output
-COPY --from=builder /output/*.deb /output/
diff --git a/packaging/debian/build-helpers/build-flagcx.sh b/packaging/debian/build-helpers/build-flagcx.sh
index 14a7b4389..d72e869d0 100755
--- a/packaging/debian/build-helpers/build-flagcx.sh
+++ b/packaging/debian/build-helpers/build-flagcx.sh
@@ -3,7 +3,7 @@ set -e
 
 # Unified FlagCX Debian package build script
 # Usage: ./packaging/debian/build-helpers/build-flagcx.sh <backend> [base_image_version]
-# Supported backends: nvidia, metax
+# Supported backends: nvidia, metax, ascend
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_DIR="$(dirname "$(dirname "$(dirname "$SCRIPT_DIR")")")"
@@ -31,6 +31,7 @@ if [ -z "$BACKEND" ]; then
     echo "Supported backends:"
     echo "  nvidia  - Build packages for NVIDIA GPUs"
     echo "  metax   - Build packages for MetaX accelerators"
+    echo "  ascend  - Build packages for Ascend NPUs"
     echo ""
     echo "Optional arguments:"
     echo "  base_image_version - Base image version tag (default: latest)"
@@ -52,9 +53,13 @@ case "$BACKEND" in
         BASE_IMAGE="harbor.baai.ac.cn/flagbase/flagbase-metax"
         VENDOR="metax"
         ;;
+    ascend)
+        BASE_IMAGE="harbor.baai.ac.cn/flagbase/flagbase-ascend"
+        VENDOR="ascend"
+        ;;
     *)
         log_error "Invalid backend: $BACKEND"
-        echo "Supported backends: nvidia, metax"
+        echo "Supported backends: nvidia, metax, ascend"
         exit 1
         ;;
 esac
@@ -62,6 +67,14 @@ esac
 log_info "Building FlagCX Debian packages for $BACKEND backend"
 log_info "Using base image: ${BASE_IMAGE}:${BASE_IMAGE_VERSION}"
 
+# Sync changelog from CHANGELOG.md
+log_step "Synchronizing changelog..."
+if [ -f "${PROJECT_DIR}/packaging/sync-changelog.py" ]; then
+    python3 "${PROJECT_DIR}/packaging/sync-changelog.py" || log_warn "Failed to sync changelog"
+else
+    log_warn "sync-changelog.py not found, skipping changelog sync"
+fi
+
 DOCKERFILE="${SCRIPT_DIR}/Dockerfile.deb"
 
 # Check if Dockerfile exists
@@ -77,11 +90,11 @@ IMAGE_TAG="flagcx-deb-${BACKEND}:${BASE_IMAGE_VERSION}"
 log_step "Building container image: $IMAGE_TAG"
 
 if ! docker build \
+    --network=host \
     -f "$DOCKERFILE" \
     --build-arg BASE_IMAGE="$BASE_IMAGE" \
     --build-arg BASE_IMAGE_VERSION="$BASE_IMAGE_VERSION" \
     --build-arg VENDOR="$VENDOR" \
-    --target output \
     -t "$IMAGE_TAG" \
     "$PROJECT_DIR"; then
     log_error "Docker build failed for $BACKEND"
diff --git a/packaging/debian/control b/packaging/debian/control
index 26dc89c17..2fed7819f 100644
--- a/packaging/debian/control
+++ b/packaging/debian/control
@@ -20,12 +20,15 @@ X-Build-Environment: This package is designed to be built in backend-specific
  .
   - MetaX backend: Requires maca_sdk (from repos.metax-tech.com)
     Built in Ubuntu 22.04 with MetaX APT repository configured
+ .
+  - Ascend backend: Requires Ascend CANN toolkit
+    Built in Ubuntu 22.04 with Ascend SDK
  .
  The Build-Depends listed above are for the Debian packaging tools only.
  Backend-specific dependencies are provided by the container environment.
 
 Package: libflagcx-metax
-Build-Profiles: <!pkg.flagcx.nvidia-only>
+Build-Profiles: <!pkg.flagcx.nvidia-only !pkg.flagcx.ascend-only>
 Architecture: amd64
 Depends: ${shlibs:Depends}, ${misc:Depends}
 Description: FlagCX communication library for MetaX hardware
@@ -37,7 +40,7 @@ Description: FlagCX communication library for MetaX hardware
  MCCL backend support.
 
 Package: libflagcx-metax-dev
-Build-Profiles: <!pkg.flagcx.nvidia-only>
+Build-Profiles: <!pkg.flagcx.nvidia-only !pkg.flagcx.ascend-only>
 Section: libdevel
 Architecture: amd64
 Depends: libflagcx-metax (= ${binary:Version}), ${misc:Depends}
@@ -48,7 +51,7 @@ Description: FlagCX development files for MetaX hardware
  building applications against libflagcx-metax.
 
 Package: libflagcx-nvidia
-Build-Profiles: <!pkg.flagcx.metax-only>
+Build-Profiles: <!pkg.flagcx.metax-only !pkg.flagcx.ascend-only>
 Architecture: amd64
 Depends: ${shlibs:Depends}, ${misc:Depends}
 Description: FlagCX communication library for NVIDIA hardware
@@ -60,7 +63,7 @@ Description: FlagCX communication library for NVIDIA hardware
  NCCL backend support.
 
 Package: libflagcx-nvidia-dev
-Build-Profiles: <!pkg.flagcx.metax-only>
+Build-Profiles: <!pkg.flagcx.metax-only !pkg.flagcx.ascend-only>
 Section: libdevel
 Architecture: amd64
 Depends: libflagcx-nvidia (= ${binary:Version}), ${misc:Depends}
@@ -69,3 +72,26 @@ Description: FlagCX development files for NVIDIA hardware
  .
  This package contains the header files and development files for
  building applications against libflagcx-nvidia.
+
+Package: libflagcx-ascend
+Build-Profiles: <!pkg.flagcx.nvidia-only !pkg.flagcx.metax-only>
+Architecture: amd64 arm64
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Description: FlagCX communication library for Ascend NPUs
+ FlagCX is a scalable and adaptive cross-chip communication library.
+ It serves as a platform where developers, researchers, and AI engineers
+ can collaborate on various projects.
+ .
+ This package contains the shared library built for Huawei Ascend NPUs
+ with HCCL backend support.
+
+Package: libflagcx-ascend-dev
+Build-Profiles: <!pkg.flagcx.nvidia-only !pkg.flagcx.metax-only>
+Section: libdevel
+Architecture: amd64 arm64
+Depends: libflagcx-ascend (= ${binary:Version}), ${misc:Depends}
+Description: FlagCX development files for Ascend NPUs
+ FlagCX is a scalable and adaptive cross-chip communication library.
+ .
+ This package contains the header files and development files for
+ building applications against libflagcx-ascend.
diff --git a/packaging/debian/rules b/packaging/debian/rules
index a80459541..3f9396777 100755
--- a/packaging/debian/rules
+++ b/packaging/debian/rules
@@ -2,120 +2,57 @@
 
 export DH_VERBOSE = 1
 
-# Allow building only specific backend via environment variable
-# Usage: FLAGCX_BUILD_BACKEND=metax dpkg-buildpackage ...
-# Valid values: metax, nvidia, all (default)
-FLAGCX_BUILD_BACKEND ?= all
+# Supported backends - add new vendors here
+SUPPORTED_BACKENDS = nvidia metax ascend
 
-# Build directories for different backends
-BUILD_DIR_METAX = $(CURDIR)/build-metax
-BUILD_DIR_NVIDIA = $(CURDIR)/build-nvidia
+# Usage: FLAGCX_BUILD_BACKEND=nvidia dpkg-buildpackage ...
+# Each backend requires its own SDK environment (container).
+FLAGCX_BUILD_BACKEND ?=
+
+# Validate backend
+ifeq ($(filter $(FLAGCX_BUILD_BACKEND),$(SUPPORTED_BACKENDS)),)
+  $(error FLAGCX_BUILD_BACKEND must be one of: $(SUPPORTED_BACKENDS). Each backend requires its own SDK environment.)
+endif
+
+# Derived variables from backend name
+BACKEND = $(FLAGCX_BUILD_BACKEND)
+BACKEND_UPPER = $(shell echo $(BACKEND) | tr a-z A-Z)
+BUILD_DIR = $(CURDIR)/build-$(BACKEND)
 
 %:
 	dh $@
 
 override_dh_auto_clean:
 	dh_auto_clean
-	rm -rf $(BUILD_DIR_METAX) $(BUILD_DIR_NVIDIA)
+	rm -rf $(foreach b,$(SUPPORTED_BACKENDS),$(CURDIR)/build-$(b))
 	$(MAKE) clean || true
 
 override_dh_auto_build:
-ifeq ($(FLAGCX_BUILD_BACKEND),nvidia)
-	@echo "Building NVIDIA variant only"
-	# Build NVIDIA variant
-	mkdir -p $(BUILD_DIR_NVIDIA)
-	$(MAKE) USE_NVIDIA=1 PREFIX=/usr
-	# Copy built files to nvidia build dir
-	mkdir -p $(BUILD_DIR_NVIDIA)/lib $(BUILD_DIR_NVIDIA)/include
-	cp -a build/lib/libflagcx.so* $(BUILD_DIR_NVIDIA)/lib/ || cp -a build/libflagcx.so* $(BUILD_DIR_NVIDIA)/lib/
-	cp -r flagcx/include $(BUILD_DIR_NVIDIA)/include/flagcx
-else ifeq ($(FLAGCX_BUILD_BACKEND),metax)
-	@echo "Building MetaX variant only"
-	# Build MetaX variant
-	mkdir -p $(BUILD_DIR_METAX)
-	$(MAKE) USE_METAX=1 PREFIX=/usr
-	# Copy built files to metax build dir
-	mkdir -p $(BUILD_DIR_METAX)/lib $(BUILD_DIR_METAX)/include
-	cp -a build/lib/libflagcx.so* $(BUILD_DIR_METAX)/lib/ || cp -a build/libflagcx.so* $(BUILD_DIR_METAX)/lib/
-	cp -r flagcx/include $(BUILD_DIR_METAX)/include/flagcx
-else
-	@echo "Building both variants"
-	# Build MetaX variant
-	mkdir -p $(BUILD_DIR_METAX)
-	$(MAKE) USE_METAX=1 PREFIX=/usr
-	# Copy built files to metax build dir
-	mkdir -p $(BUILD_DIR_METAX)/lib $(BUILD_DIR_METAX)/include
-	cp -a build/lib/libflagcx.so* $(BUILD_DIR_METAX)/lib/ || cp -a build/libflagcx.so* $(BUILD_DIR_METAX)/lib/
-	cp -r flagcx/include $(BUILD_DIR_METAX)/include/flagcx
-
-	# Clean for next build
-	$(MAKE) clean
-
-	# Build NVIDIA variant
-	mkdir -p $(BUILD_DIR_NVIDIA)
-	$(MAKE) USE_NVIDIA=1 PREFIX=/usr
-	# Copy built files to nvidia build dir
-	mkdir -p $(BUILD_DIR_NVIDIA)/lib $(BUILD_DIR_NVIDIA)/include
-	cp -a build/lib/libflagcx.so* $(BUILD_DIR_NVIDIA)/lib/ || cp -a build/libflagcx.so* $(BUILD_DIR_NVIDIA)/lib/
-	cp -r flagcx/include $(BUILD_DIR_NVIDIA)/include/flagcx
-endif
+	@echo "Building $(BACKEND) variant"
+	mkdir -p $(BUILD_DIR)
+	$(MAKE) USE_$(BACKEND_UPPER)=1 PREFIX=/usr
+	mkdir -p $(BUILD_DIR)/lib $(BUILD_DIR)/include
+	cp -a build/lib/libflagcx.so* $(BUILD_DIR)/lib/ || \
+		cp -a build/libflagcx.so* $(BUILD_DIR)/lib/
+	cp -r flagcx/include $(BUILD_DIR)/include/flagcx
 
 override_dh_auto_install:
-ifeq ($(FLAGCX_BUILD_BACKEND),nvidia)
-	@echo "Installing NVIDIA variant only"
-	# Install NVIDIA variant
-	mkdir -p debian/libflagcx-nvidia/usr/lib
-	mkdir -p debian/libflagcx-nvidia-dev/usr/include/flagcx
-	cp -a $(BUILD_DIR_NVIDIA)/lib/libflagcx.so* debian/libflagcx-nvidia/usr/lib/
-	# Fix SONAME and RPATH
-	cd debian/libflagcx-nvidia/usr/lib && \
-		patchelf --set-soname libflagcx.so.0 libflagcx.so && \
-		patchelf --remove-rpath libflagcx.so && \
-		ln -sf libflagcx.so libflagcx.so.0 && \
-		ln -sf libflagcx.so libflagcx.so.0.1.0
-	cp -r $(BUILD_DIR_NVIDIA)/include/* debian/libflagcx-nvidia-dev/usr/include/flagcx/
-else ifeq ($(FLAGCX_BUILD_BACKEND),metax)
-	@echo "Installing MetaX variant only"
-	# Install MetaX variant
-	mkdir -p debian/libflagcx-metax/usr/lib
-	mkdir -p debian/libflagcx-metax-dev/usr/include/flagcx
-	cp -a $(BUILD_DIR_METAX)/lib/libflagcx.so* debian/libflagcx-metax/usr/lib/
-	# Fix SONAME and RPATH
-	cd debian/libflagcx-metax/usr/lib && \
+	@echo "Installing $(BACKEND) variant"
+	# Install shared library
+	mkdir -p debian/libflagcx-$(BACKEND)/usr/lib
+	cp -a $(BUILD_DIR)/lib/libflagcx.so* debian/libflagcx-$(BACKEND)/usr/lib/
+	# Fix SONAME, RPATH and create symlinks
+	cd debian/libflagcx-$(BACKEND)/usr/lib && \
 		patchelf --set-soname libflagcx.so.0 libflagcx.so && \
 		patchelf --remove-rpath libflagcx.so && \
 		ln -sf libflagcx.so libflagcx.so.0 && \
 		ln -sf libflagcx.so libflagcx.so.0.1.0
-	cp -r $(BUILD_DIR_METAX)/include/* debian/libflagcx-metax-dev/usr/include/flagcx/
-else
-	@echo "Installing both variants"
-	# Install MetaX variant
-	mkdir -p debian/libflagcx-metax/usr/lib
-	mkdir -p debian/libflagcx-metax-dev/usr/include/flagcx
-	cp -a $(BUILD_DIR_METAX)/lib/libflagcx.so* debian/libflagcx-metax/usr/lib/
-	# Fix SONAME and RPATH for MetaX
-	cd debian/libflagcx-metax/usr/lib && \
-		patchelf --set-soname libflagcx.so.0 libflagcx.so && \
-		patchelf --remove-rpath libflagcx.so && \
-		ln -sf libflagcx.so libflagcx.so.0 && \
-		ln -sf libflagcx.so libflagcx.so.0.1.0
-	cp -r $(BUILD_DIR_METAX)/include/* debian/libflagcx-metax-dev/usr/include/flagcx/
-
-	# Install NVIDIA variant
-	mkdir -p debian/libflagcx-nvidia/usr/lib
-	mkdir -p debian/libflagcx-nvidia-dev/usr/include/flagcx
-	cp -a $(BUILD_DIR_NVIDIA)/lib/libflagcx.so* debian/libflagcx-nvidia/usr/lib/
-	# Fix SONAME and RPATH for NVIDIA
-	cd debian/libflagcx-nvidia/usr/lib && \
-		patchelf --set-soname libflagcx.so.0 libflagcx.so && \
-		patchelf --remove-rpath libflagcx.so && \
-		ln -sf libflagcx.so libflagcx.so.0 && \
-		ln -sf libflagcx.so libflagcx.so.0.1.0
-	cp -r $(BUILD_DIR_NVIDIA)/include/* debian/libflagcx-nvidia-dev/usr/include/flagcx/
-endif
+	# Install development headers
+	mkdir -p debian/libflagcx-$(BACKEND)-dev/usr/include/flagcx
+	cp -r $(BUILD_DIR)/include/* debian/libflagcx-$(BACKEND)-dev/usr/include/flagcx/
 
 override_dh_auto_test:
-	# Skip tests for now
+	# Skip tests - requires vendor hardware
 	@echo "Skipping tests"
 
 override_dh_dwz:
@@ -123,6 +60,6 @@ override_dh_dwz:
 	@echo "Skipping dwz debug info optimization"
 
 override_dh_shlibdeps:
-	# Ignore missing CUDA/vendor library dependencies
-	# These are provided by vendor-specific runtime packages (e.g., CUDA runtime, MACA runtime)
+	# Ignore missing vendor library dependencies (CUDA, MACA, CANN, etc.)
+	# These are provided by vendor-specific runtime environments
 	dh_shlibdeps --dpkg-shlibdeps-params=--ignore-missing-info || true