Gastric Type Adenocarcinoma (GAS) With STK11 Mutation

The goal of this clinical trial is to evaluate the safety and preliminary efficacy of WX390 combined with Toripalimab in patients with advanced Gastric-type Endocervical Adenocarcinoma with STK11 mutations. The main questions it aims to answer are: * Pharmacokinetic (PK) characteristics of WX390 combined with Toripalimab treatment. * Safety and preliminary in combined therapy. Participants will be treated with WX390 orally and Toripalimab intravenously, and follow the efficacy and safety evaluation according to the protocol.