Depends on which airlines you will fly. For general case: 从福州或厦门登机时 cannot 出联乘登机牌 到北京或上海后,需要提取托运行李重新check in. You must pay more attention on Shanghai. Shanghai has 2 airports: PVG and SHA. All airlines will fly US from PVG, but not SHA, while most of chinese domestic flight will fly SHA, not PVG. You'd better to fly PVG(pudong) from 福州或厦门, avoid SHA(HongQiao). Transportation from SHA to PVG is a nightmare.