Yinshan Feihu is a friend PK quiz mini-game developed by Xiangming Technology Co., Ltd. for clients. It features question bank practice, inviting friends to PK, 1V1 PK quiz, and 3V3 PK quiz, among which 3V3 has two modes: Silver Arena and Gold Arena. It also has recharge and product redemption functions. Users can recharge, 1 yuan = 10 silver coins, and each winning round in PK with friends earns corresponding silver coins. Silver coins can be used to redeem products in the redemption mall.