add CoC

CODE_OF_CONDUCT.md

@@ -0,0 +1,9 @@
+# About *Common Program of Qiuwen Baike* 关于《求闻百科共同纲领》
+
+The development of this software is subject to the *Common Program of Qiuwen Baike*, which is a constitutional document of *Qiuwen Baike* and its community and plays the role similar to Code of Conduct in other open-source communities.
+
+本软件之开发遵循《求闻百科共同纲领》，该文件为求闻百科纲领性文件，起到类似其他开源社区中“行为准则”的作用。
+
+You can read the *Common Program* at <https://qwbk.org/c/31162>.
+
+您可以在下列网址查阅《共同纲领》：<https://qwbk.org/c/31162>。