Upvote:0
As You live in the US and have US citizenship you'd be best off applying for the 10 year visa in your US passport (You need to be both a US Citizen and a US resident to get the 10 year visa - at least that was the case when i got mine in 2016).
With a UK passport most people receive a 2 year visa.
Upvote:5
US citizens can now receive 10-year visas to China. Although there has been some talk about this, I donβt believe these are normally issued to British citizens yet, so if you travel to China frequently and are interested in a 10-year visa, applying using your US passport would be best.