What was the function of Chongwenmen in ancient times?

Chongwenmen, formerly known as Wenmingmen, is commonly known as Hadmen and Haidaimen. Chongwenmen is famous for its ironclad fish in Zhenhai Temple, Zuoshou Town, Wengcheng. "Chongwen armored fish" is famous all over Kyoto. In addition, Chongwenmen's heavy tax clearance also makes foreign merchants daunting.

Take a wine cart, and the wine road is outside the city. Most of the fine wines of that year were shipped from Zhuozhou, Hebei and other places, so it is natural to take the south road when entering Beijing. The wine truck is pushed to Zuo 'anmen in the outer city, and then to Chongwenmen to pay taxes.