diff --git a/code/public/static/cover/chang-nian.jpg b/code/public/static/cover/chang-nian.jpg new file mode 100644 index 0000000..db81bea Binary files /dev/null and b/code/public/static/cover/chang-nian.jpg differ diff --git a/code/public/static/cover/he-biao-jie-tong-ju.jpg b/code/public/static/cover/he-biao-jie-tong-ju.jpg new file mode 100644 index 0000000..f46adf2 Binary files /dev/null and b/code/public/static/cover/he-biao-jie-tong-ju.jpg differ