Here is 3 tips which is very useful on how to get to Yiwu from shanghai pudong airport in both Chinese and English:

1.To Taxi driver in shanghai pudong airport:

Pls drive me to the shanghai railway station, Tks.

请送我至上海火车站,谢谢.

2.To ticket seller in shanghai railway station:

Pls buy me the fastest train to Yiwu city, Tks.

请给我买张最快去义乌的票,谢谢.

3.To taxi driver in Yiwu trainstation:

Pls drive me to *** hotel in Yiwu,Tks.

请送我至***酒店,谢谢.

Anyway, If you still have problem on getting to Yiwu in time,Pls call Mr.Roger @ 0086-159 8859 0001, We will explain you in details on how to find ways to Yiwu city patiently,Enjoy your trip and Welcome to Yiwu ,Cheers !