Zhengzhi refers to an inscription on a Chinese painting or calligraphy, written by the author to the recipient. The original intention is to ask the recipient to take a look at what is incorrect or inappropriate. Those who need to be corrected are polite words, which means asking for advice. In addition, commonly used polite words include Gao Jian (gao Lun), Gui Geng (Fang Ling), please, patronize (patronize), patronize (patronize), waiting, yazheng, forgive, correct (correct), excuse me, etc., among which "yazheng" refers to It is used when donating one's poems, calligraphy, paintings, and works to others to express asking for their advice, which is somewhat similar to "zhengzhi".