How can I go to Yiwu from Shenzhen?

There are three methods.
1. You can take direct buses from Longgang Long-distance Bus Station or Yinhu Bus Station at 16:30 or 15:00. The bus costs about 400 RMB and 14 hours to reach.
2. Direct trains T212, T102, k2056 can take you there. The ticket fare is about 201RMB for the hard seat and 360RMB for the hard sleeper. It will take 15-20h or more for the whole journey. Detailed depature and arrival times can be searched on this website:
https://www.travelchinaguide.com/china-trains/
3. The third one is by air. The direct flight can take you there in 1.5h or a little longer. But it is a little expensive.