How to use the 2021 Palace Clearance Chart for Childbirth and Daughter? With the development of science and technology, modern people are becoming more and more selective about whether they have a boy or a girl, and the Qing Gong Biao is one of the ways to judge whether it is a boy or a girl. So, how to use the 2021 birth chart to clear the palace? The following will introduce it in detail from four aspects. 1. Understand the work of Qing Gongbiao