Passport expiration 2 months but 10 year visa

We are American citizens, traveling to China in March for 2 weeks. We have purchased our tickets. My daughters passport exires in June, 2 months after we leave PRC to return home. We already have a 10 year entry permit. Will she be ok? We have purchased our airline tickets so I don't know if I can change her passport number on the tickets if I do renew it before we travel.