By comparison, the paper thinks that Xiamen Dialect must be the origin of Sijie Dialect.

从这些对应关系中，我们可以看到，厦门话当为思界话的祖语。

youdao

Assist the Vice Mayor Li Sijie in his work to promote agricultural science and technology.

协助李思杰同志负责农业科技进步工作。

youdao