Who are these two kings?

Although this is not a legal issue, since I have seen it, I will give you an answer: there are many "two kings" in China, and I will give you two of the most famous ones: 1, the digger of Dujiangyan in China, Li Bing, the magistrate of Shuqin County, and his son Erlang, who are collectively called the two kings. Now there is an Erwang Temple in Dujiangyan, Sichuan Province to commemorate them. Wang Xizhi and Wang Xianzhi, the great calligraphers in the Eastern Jin Dynasty, were also called the two calligraphers.