What is the best way to ocean shanghai from bullet train coming from Beijing?

If you mean that you want to Ocean Park in SH, then may the following can help!

If you leave from Hongqiao Railway Station, you can take metro line 2 to Lujiazui, and then go out from Exit 1. After that, walk northeast along Lujiazui Ring Rd for 10 minutes, you will get there.
If you leave from SH Station, then you need to take metro line 1 and transfer to line 2 at People’s Square first.