This is a wrong idea. As people outside China, do not aware how China ISP work.
Whether you sign-up for a west coast or any other location server in USA, the speed to China make no different, especially during mid to end of each month, China ISP connection to USA speed even more slower than in the begining of the month. This is a serious problem that happen to every internet users in China. Before China government pushing the local ISP to increase speed and reduce cost for every home user connection to increase the users for Internet Connection in China, the speed for international bandwdith still ok, but after all ISP in China, increase the speed to 50M or 100M internet connection (You can only get this speed if the server was hosted in China), but reduce the speed to international bandwidth (outside China network). Which mean, if your server is located inside China, the internet users can get full speed, but if your server was outside China, max connection to the outside China network, the speed is only from 1Mbps to 2Mbps, sometime during perk hours, I think even 1Mbps also can’t get. So make no different which part of USA server you get, even if the provider got so called “China direct bandwidth” or “Asian Optimized bandwidth”, doesn’t mean you speed will be good.
So if you really want to have good speed to China, Hong Kong will be the best selection than any other country. If not, best option will be using a China Hosting.
If you got staff in China, why not get a China server directly, filling for ICP is very simple and fast, although the ICP department mention is approval within 21 working days, but at most case, the ICP number is provided within 3-7 working days. As long as your china staff is local with China National ID (exclude Taiwan and Hong Kong), then there is no problem applying for the ICP. For the further requirement, will base on your staff National ID issued from which part of the China province, as different Province ICP Department in China, got different requirement. eg. if your office is in Beijing but company registered in Shenzhen, your ICP department will need to be in Shenzhen ICP department handle it and not Beijing ICP department. And if filling under personal and not under company, the process is the same, only thing for Company filling, require company registered detail and a copy of the registered certificate in China (exclude Taiwan and Hong Kong is not allowed).
Don’t listen to people mention so called “China direct bandwidth” or “Asian Optimized bandwidth”. It just a marketing or sales static for people who do not understand about China Internet Network.