Royal Tramp 2 (1992) on Netflix

Plot summary

Lung Erh, whose cover as the Empress was blown, returns to the St Dragon Sect and takes over its leadership, pledging the sect's support to Wu Sangui, who plans to rebel against the Qing dynasty. The Kangxi Emperor learns of the plot and arranges a marriage between Princess Jianning and Wu Sangui's son, Wu Yingxiong, ordering Wai Siu Bo to oversee the wedding in Yunnan and keep watch on Wu Sangui. Wai Siu Bo is the servant who named Lung Erh as the fake empress, and she is bent on eliminating him. She is also assigned to guard the Prince he serves, and the princess tells Wai Siu Bo she is carrying his child.