Strategy Centre does seem to have lots of articles about containing China and basically making life hard for the PRC.
China obviously does need a more credible nuclear deterrent and we see this with the DF-31A, JL-2...
But I think an answer to your fears of China being boxed in and challenged should be diplomatic. Make friends with the countries instead of scaring the heck out of them with thousands of nukes.
If any extra military equipment is acquired by China without having relatively good relations with the potential enemies you pointed out in the first post then those countries and people like richard fisher would keep harping on about the china threat. Not a good look internationally.
Making more nukes may provoke America to build up it's missile defence more quickly to maintain its huge margin of domination which it has with China which they seem unable to give up (which is fair enough), it will drag China into a type of arms race, which no one wants.
Just let China take the current international situation like it is and within a century, if the world still exists we might see the tables turned a bit...