From shanghai pudong airport to yiwu you can choose route as following:

1.  Car service: will cost you $120 (around 800rmb), 
2.  If you want to by high speed train, first from shanghai pudong airport to shanghai hongqiao railway station by subway line2, pass 28 stations, it will takes1.5hours.
Hongqiao airport also have airport bus to hongqiao railway station, but will takes around 2 hours, maybe will get stuck in traffic jams.
3.  If by taxi, you will spend around rmb200, i think if you have time, subway is best choice for you.
4.  from shanghai hongqiao railway station to yiwu train station time as following :

From hangzhou xiaoshan airport to yiwu you can choose route as following:

1.  Our Company car service: will cost you $50 (around 350rmb), we will return after make order.
2.  Hangzhou xiaoshan airport has bus to yiwu bus station, bus ticket rmb60 one person, it will takes 2 hours, yiwu bus station is near to international market.
3.  If you want to by high speed train to yiwu, first you need to from xiaoshan airport by bus to hangzhou east station, rmb 20 one person,around 30minutes.After you reached in yiwu bus station, you don”t worry, we will pick up you.