Hi, I think you'd better land at Hongqiao Airport. Then walk to Hongqiao Railway Station to take bullet train to Yiwu. It takes about 2 hours and costs CNY94 for second class seat or CNY114 for first class seat. If you land at Pudong Airport, you could take the direct bus from Pudong airport to Yiwu. It departs at 11:10 and 17:10. It is a 4 hours bus travel and costs CNY180.