https://www.google.ca/amp/s/www.forbes.com/sites/china/2010/... See above for a more full analysis, Chinese govt. could have given preferential treatment but it was Ebay that had adverts all over Chinese buses and had blocked Taobao from advertising on Chinese web platforms through exclusive partnerships.
How do we know they didn't? They could have just decided "Now that Taobao is up and running, we can get rid of ebay". They've done worse before, so it's not a stretch.
It's interesting that there are no massive web properties in China with the bulk market share (google, facebook, ebay, amazon, twitter, etc) that aren't Chinese owned. Yet, in the entire rest of the world, those same websites are #1. That's not just some coincidence or one-off, that's clearly governmental manipulation and control.
If it was just one or two web properties, I could understand. Like how it is with Yahoo! Japan. But all of them? Sorry, China doesn't want western companies running the show within their country. Articles like this are moot since there was no future with eBay in the #1 spot thanks to the CCP.