diff --git a/diagram/and_gate.drawio b/diagram/and_gate.drawio
new file mode 100644
index 0000000..6e91efb
--- /dev/null
+++ b/diagram/and_gate.drawio
@@ -0,0 +1 @@
+<mxfile host="Electron" modified="2022-05-18T02:21:37.248Z" agent="5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/16.5.1 Chrome/96.0.4664.110 Electron/16.0.7 Safari/537.36" etag="Hl2TTIOjfhyBMdYay-_H" version="16.5.1" type="device"><diagram id="5Xvh56vFpQx7t7IzU6PJ" name="第 1 页">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</diagram></mxfile>
\ No newline at end of file