How did Ji Richang decide to get married?

Hui people's wedding should choose an auspicious day, and they can't get married in the month when Muhammad died. Generally, the man goes to the mosque and asks the imam to choose three auspicious days and write them on red paper one by one. Then the man gives the red paper to the woman, and the woman chooses a day from it. Hui people often choose "main hemp day" (Friday) to get married.