四要同环图 （原文发于：https://mp.weixin.qq.com/s?__biz=MzIwNzIyMjE3OQ==&mid=2651531837&idx=1&sn=c9f6cd457e4a98d6730808eecdce43a1&chksm=8cea2ef1bb9da7e7ae9cb0140d74533e77ee9062f0dda66eeb2e3a0c65349bd416ccb401573b&mpshare=1&scene=1&srcid=1207A33LbfVNfRnkgK24fw84&pass_ticket=9qoUDEgCxeB2sHGq5bJ6G3ujo3%2BEjk6Cs%2BUacLdNf%2BUlOHeTuJfbA9MPf9RrXH63#rd）
