《明史·志·卷三十二》
三作揖三礼让，然后登上庭堂，面对面拜两拜，走上坐席。
三揖三让，而后升堂，相向再拜，升坐。
The guest bowed three times and retreated three times. Then they went up to the hall, faced each other and bowed twice, and walked up to their seats.