Check out Freightos. They're basically a marketplace for freight forwarders in the same way Expedia is a marketplace for flights and hotels.
We've recently started partnering with them and have found their service to be excellent.
Hope this helps!
You can google Chinese shipping forwarder or source from facebook group, there are many options for you to choose. You only need to find a Chinese shipping agent offers both small packages shipping and courier shipping service to help you ship from China to CA or other countries, the forwarder could also help you stock in China and ship worldwide based on your orders.