What's the role of Lin Baoyi, the drug lawyer sitting in the back?

Promote the development of the plot. It is very useful for Lin Baoyi to sit behind a drug lawyer. He is not only a mentor and friend of the leading actor tilapia, but also one of the key figures in solving the case in the play, and has made important contributions to the promotion and development of the plot. The Poisonous Tongue Lawyer is a suspense TV series produced by Jiang Zhiqiang and directed by Wai Lun Ng.