diff --git a/build/build-images.sh b/build/build-images.sh
index 106a9b6e..dc9efeab 100755
--- a/build/build-images.sh
+++ b/build/build-images.sh
@@ -19,6 +19,23 @@ ARCH_MAP=(
 build_arch() {
     local rust_target="$1"
 
+    case "${CHINAMIRRO:-}" in
+        1|true|TRUE|yes|YES|on|ON)
+            local cross_build_opts="${CROSS_BUILD_OPTS:+$CROSS_BUILD_OPTS }--build-arg CHINAMIRRO=1"
+            echo "=== China mirror acceleration: enabled (Tsinghua) ==="
+            echo "=== Building: $rust_target (via cross with custom Dockerfile) ==="
+            env \
+                CROSS_BUILD_OPTS="$cross_build_opts" \
+                CARGO_SOURCE_CRATES_IO_REPLACE_WITH=tuna \
+                CARGO_SOURCE_TUNA_REGISTRY=sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/ \
+                CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse \
+                RUSTUP_DIST_SERVER=https://mirrors.tuna.tsinghua.edu.cn/rustup \
+                RUSTUP_UPDATE_ROOT=https://mirrors.tuna.tsinghua.edu.cn/rustup/rustup \
+                cross build --release --target "$rust_target"
+            return
+            ;;
+    esac
+
     echo "=== Building: $rust_target (via cross with custom Dockerfile) ==="
     cross build --release --target "$rust_target"
 }
@@ -49,6 +66,7 @@ case "${1:-all}" in
         echo "Examples:"
         echo "  $0              # Build all"
         echo "  $0 x86_64       # Build x86_64 only"
+        echo "  CHINAMIRRO=1 $0 arm64  # Build with Tsinghua mirrors"
         exit 0
         ;;
     *)
diff --git a/build/cross/Dockerfile.arm64 b/build/cross/Dockerfile.arm64
index e67d71dc..699f96f1 100644
--- a/build/cross/Dockerfile.arm64
+++ b/build/cross/Dockerfile.arm64
@@ -6,16 +6,36 @@ FROM debian:11
 # Linux headers used by v4l2r bindgen
 ARG LINUX_HEADERS_VERSION=6.6
 ARG LINUX_HEADERS_SHA256=
+ARG CHINAMIRRO=0
 
-# Set Rustup mirrors (Aliyun)
-#ENV RUSTUP_UPDATE_ROOT=https://mirrors.aliyun.com/rustup/rustup \
-#    RUSTUP_DIST_SERVER=https://mirrors.aliyun.com/rustup
+# Optionally use Tsinghua mirrors for builds in China.
+RUN if [ "$CHINAMIRRO" = "1" ]; then \
+        sed -i \
+            -e 's|http://deb.debian.org/debian|http://mirrors.tuna.tsinghua.edu.cn/debian|g' \
+            -e 's|http://security.debian.org/debian-security|http://mirrors.tuna.tsinghua.edu.cn/debian-security|g' \
+            /etc/apt/sources.list; \
+    fi
 
 # Install Rust toolchain
 RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     ca-certificates \
+    && if [ "$CHINAMIRRO" = "1" ]; then \
+        export RUSTUP_DIST_SERVER=https://mirrors.tuna.tsinghua.edu.cn/rustup; \
+        export RUSTUP_UPDATE_ROOT=https://mirrors.tuna.tsinghua.edu.cn/rustup/rustup; \
+    fi \
     && curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable \
+    && if [ "$CHINAMIRRO" = "1" ]; then \
+        mkdir -p /root/.cargo; \
+        printf '%s\n' \
+            '[source.crates-io]' \
+            "replace-with = 'tuna'" \
+            '[source.tuna]' \
+            'registry = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"' \
+            '[registries.tuna]' \
+            'index = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"' \
+            > /root/.cargo/config.toml; \
+    fi \
     && rm -rf /var/lib/apt/lists/*
 
 ENV PATH="/root/.cargo/bin:${PATH}"
@@ -327,7 +347,11 @@ RUN mkdir -p /tmp/ffmpeg-build && cd /tmp/ffmpeg-build \
     && rm -rf /tmp/ffmpeg-build /tmp/aarch64-cross.txt /tmp/aarch64-pkg-config
 
 # Add Rust target
-RUN rustup target add aarch64-unknown-linux-gnu
+RUN if [ "$CHINAMIRRO" = "1" ]; then \
+        export RUSTUP_DIST_SERVER=https://mirrors.tuna.tsinghua.edu.cn/rustup; \
+        export RUSTUP_UPDATE_ROOT=https://mirrors.tuna.tsinghua.edu.cn/rustup/rustup; \
+    fi \
+    && rustup target add aarch64-unknown-linux-gnu
 
 # Configure environment for cross-compilation
 ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc \
diff --git a/build/cross/Dockerfile.armv7 b/build/cross/Dockerfile.armv7
index 4e8f4617..483013cf 100644
--- a/build/cross/Dockerfile.armv7
+++ b/build/cross/Dockerfile.armv7
@@ -6,16 +6,36 @@ FROM debian:11
 # Linux headers used by v4l2r bindgen
 ARG LINUX_HEADERS_VERSION=6.6
 ARG LINUX_HEADERS_SHA256=
+ARG CHINAMIRRO=0
 
-# Set Rustup mirrors (Aliyun)
-#ENV RUSTUP_UPDATE_ROOT=https://mirrors.aliyun.com/rustup/rustup \
-#    RUSTUP_DIST_SERVER=https://mirrors.aliyun.com/rustup
+# Optionally use Tsinghua mirrors for builds in China.
+RUN if [ "$CHINAMIRRO" = "1" ]; then \
+        sed -i \
+            -e 's|http://deb.debian.org/debian|http://mirrors.tuna.tsinghua.edu.cn/debian|g' \
+            -e 's|http://security.debian.org/debian-security|http://mirrors.tuna.tsinghua.edu.cn/debian-security|g' \
+            /etc/apt/sources.list; \
+    fi
 
 # Install Rust toolchain
 RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     ca-certificates \
+    && if [ "$CHINAMIRRO" = "1" ]; then \
+        export RUSTUP_DIST_SERVER=https://mirrors.tuna.tsinghua.edu.cn/rustup; \
+        export RUSTUP_UPDATE_ROOT=https://mirrors.tuna.tsinghua.edu.cn/rustup/rustup; \
+    fi \
     && curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable \
+    && if [ "$CHINAMIRRO" = "1" ]; then \
+        mkdir -p /root/.cargo; \
+        printf '%s\n' \
+            '[source.crates-io]' \
+            "replace-with = 'tuna'" \
+            '[source.tuna]' \
+            'registry = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"' \
+            '[registries.tuna]' \
+            'index = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"' \
+            > /root/.cargo/config.toml; \
+    fi \
     && rm -rf /var/lib/apt/lists/*
 
 ENV PATH="/root/.cargo/bin:${PATH}"
@@ -316,7 +336,11 @@ RUN mkdir -p /tmp/ffmpeg-build && cd /tmp/ffmpeg-build \
     && rm -rf /tmp/ffmpeg-build /tmp/armhf-cross.txt /tmp/armhf-pkg-config
 
 # Add Rust target
-RUN rustup target add armv7-unknown-linux-gnueabihf
+RUN if [ "$CHINAMIRRO" = "1" ]; then \
+        export RUSTUP_DIST_SERVER=https://mirrors.tuna.tsinghua.edu.cn/rustup; \
+        export RUSTUP_UPDATE_ROOT=https://mirrors.tuna.tsinghua.edu.cn/rustup/rustup; \
+    fi \
+    && rustup target add armv7-unknown-linux-gnueabihf
 
 # Configure environment for cross-compilation
 ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc \
diff --git a/build/cross/Dockerfile.x86_64 b/build/cross/Dockerfile.x86_64
index 46b15ac9..8241931f 100644
--- a/build/cross/Dockerfile.x86_64
+++ b/build/cross/Dockerfile.x86_64
@@ -6,16 +6,36 @@ FROM debian:11
 # Linux headers used by v4l2r bindgen
 ARG LINUX_HEADERS_VERSION=6.6
 ARG LINUX_HEADERS_SHA256=
+ARG CHINAMIRRO=0
 
-# Set Rustup mirrors (Aliyun)
-#ENV RUSTUP_UPDATE_ROOT=https://mirrors.aliyun.com/rustup/rustup \
-#    RUSTUP_DIST_SERVER=https://mirrors.aliyun.com/rustup
+# Optionally use Tsinghua mirrors for builds in China.
+RUN if [ "$CHINAMIRRO" = "1" ]; then \
+        sed -i \
+            -e 's|http://deb.debian.org/debian|http://mirrors.tuna.tsinghua.edu.cn/debian|g' \
+            -e 's|http://security.debian.org/debian-security|http://mirrors.tuna.tsinghua.edu.cn/debian-security|g' \
+            /etc/apt/sources.list; \
+    fi
 
 # Install Rust toolchain
 RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     ca-certificates \
+    && if [ "$CHINAMIRRO" = "1" ]; then \
+        export RUSTUP_DIST_SERVER=https://mirrors.tuna.tsinghua.edu.cn/rustup; \
+        export RUSTUP_UPDATE_ROOT=https://mirrors.tuna.tsinghua.edu.cn/rustup/rustup; \
+    fi \
     && curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable \
+    && if [ "$CHINAMIRRO" = "1" ]; then \
+        mkdir -p /root/.cargo; \
+        printf '%s\n' \
+            '[source.crates-io]' \
+            "replace-with = 'tuna'" \
+            '[source.tuna]' \
+            'registry = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"' \
+            '[registries.tuna]' \
+            'index = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"' \
+            > /root/.cargo/config.toml; \
+    fi \
     && rm -rf /var/lib/apt/lists/*
 
 ENV PATH="/root/.cargo/bin:${PATH}"
@@ -221,7 +241,11 @@ RUN mkdir -p /tmp/ffmpeg-build && cd /tmp/ffmpeg-build \
     && rm -rf /tmp/ffmpeg-build
 
 # Add Rust target
-RUN rustup target add x86_64-unknown-linux-gnu
+RUN if [ "$CHINAMIRRO" = "1" ]; then \
+        export RUSTUP_DIST_SERVER=https://mirrors.tuna.tsinghua.edu.cn/rustup; \
+        export RUSTUP_UPDATE_ROOT=https://mirrors.tuna.tsinghua.edu.cn/rustup/rustup; \
+    fi \
+    && rustup target add x86_64-unknown-linux-gnu
 
 # Configure environment for static linking
 ENV PKG_CONFIG_ALLOW_CROSS=1\