Because the unity of female life is a prosperous phase, and the unity of Chen is the time to support Chen, which is consistent with the unity of the eight characters. Chen You alloy, this is the main auspicious harmony. In Chen Zhongwu's life, there were fortunes and official fortunes, so the woman's life was rich and prosperous.
Chen You-He is a strange relationship among the twelve branches of the earth. For the record, this answer is for reference only. Please don't be blind and superstitious.