I wouldn't be surprised that Chinese latest warhead is more advanced than American's W88 which was designed in 1970s.
But I'd guess that the latest version is called the W88 ALT 370 (First production Dec 2019) would be more advanced than the Chinese one
On the other hand, I will not be surprised 'Murican trying to catch up to Yu Min with W88 ALT 370 , but not quite succeeding. Only those in the know, will know. And very very unlikely that they ever will talk.
And that exclude all the august minds in this forum.
China probably been watching, and laughing from the day their 'Test number 6' shed her light over Lop Nor in June 1967.
I laugh at the innuendoes that China trying to steal 'Murican thermonuke secrets when it is obvious Yu Min configuration was, and still is, so much superior to USA.
More of the lies and smoke and mirrors 'Muricans surround themselves with and used to smear China.