What do the Cantonese like to drink which in order to relieve heat in summer? 这句话有语法错误码?

Question

What do the Cantonese like to drink which in order to relieve heat in summer?
这句话有语法错误码?（广东人夏天最喜欢喝什么来降火）

Answer 1

which去掉。in order to是介词短语，可以直接做what（也就是喜欢喝的那个东西）的目的从句。