diff --git a/backend/mpc-system/services/account/Dockerfile b/backend/mpc-system/services/account/Dockerfile
index e8add4d6..aff324d8 100644
--- a/backend/mpc-system/services/account/Dockerfile
+++ b/backend/mpc-system/services/account/Dockerfile
@@ -3,6 +3,11 @@ FROM golang:1.21-alpine AS builder
 
 RUN apk add --no-cache git ca-certificates
 
+# Set Go proxy for China
+ARG GOPROXY=https://goproxy.cn,https://goproxy.io,direct
+ENV GOPROXY=${GOPROXY}
+ENV GOSUMDB=sum.golang.google.cn
+
 WORKDIR /app
 
 COPY go.mod go.sum ./
diff --git a/backend/mpc-system/services/message-router/Dockerfile b/backend/mpc-system/services/message-router/Dockerfile
index ec5b4c92..d47a3682 100644
--- a/backend/mpc-system/services/message-router/Dockerfile
+++ b/backend/mpc-system/services/message-router/Dockerfile
@@ -3,6 +3,11 @@ FROM golang:1.21-alpine AS builder
 
 RUN apk add --no-cache git ca-certificates
 
+# Set Go proxy for China
+ARG GOPROXY=https://goproxy.cn,https://goproxy.io,direct
+ENV GOPROXY=${GOPROXY}
+ENV GOSUMDB=sum.golang.google.cn
+
 WORKDIR /app
 
 COPY go.mod go.sum ./
diff --git a/backend/mpc-system/services/server-party/Dockerfile b/backend/mpc-system/services/server-party/Dockerfile
index 2134fc26..876ffb09 100644
--- a/backend/mpc-system/services/server-party/Dockerfile
+++ b/backend/mpc-system/services/server-party/Dockerfile
@@ -3,6 +3,11 @@ FROM golang:1.21-alpine AS builder
 
 RUN apk add --no-cache git ca-certificates
 
+# Set Go proxy for China
+ARG GOPROXY=https://goproxy.cn,https://goproxy.io,direct
+ENV GOPROXY=${GOPROXY}
+ENV GOSUMDB=sum.golang.google.cn
+
 WORKDIR /app
 
 COPY go.mod go.sum ./
diff --git a/backend/mpc-system/services/session-coordinator/Dockerfile b/backend/mpc-system/services/session-coordinator/Dockerfile
index c5086357..478eca5a 100644
--- a/backend/mpc-system/services/session-coordinator/Dockerfile
+++ b/backend/mpc-system/services/session-coordinator/Dockerfile
@@ -4,6 +4,11 @@ FROM golang:1.21-alpine AS builder
 # Install dependencies
 RUN apk add --no-cache git ca-certificates
 
+# Set Go proxy for China (use GOPROXY env from build args if provided)
+ARG GOPROXY=https://goproxy.cn,https://goproxy.io,direct
+ENV GOPROXY=${GOPROXY}
+ENV GOSUMDB=sum.golang.google.cn
+
 # Set working directory
 WORKDIR /app