Jia Baoyu and Wu Yong. In Beijing Opera, Jia Baoyu, Wu Yong, and the guests in the general peace talks are all the main figures wearing long vests. The vest is a traditional costume of Peking Opera, which belongs to the accessories in clothes, commonly known as vest, vest and suspenders. It is sleeveless and has two kinds of hem, plain and embroidered, including length, flower elements and men and women.