Perhaps I see more of a gradation in policy between "go fully isolationist against" and "work in tandem with". I don't think it's likely that Biden will do the second one.
That said, he has been joining in on the anti-China rhetoric with everyone else:
Trump will continue to dismantle the nation, but Biden will likely work in tandem with China, wondering what takes there are.
This seems rather unlikely to me.
Obama did not go fully isolationist against China like Trump has, why wouldn't we expect Biden to continue that strategy.
Perhaps I see more of a gradation in policy between "go fully isolationist against" and "work in tandem with". I don't think it's likely that Biden will do the second one.
That said, he has been joining in on the anti-China rhetoric with everyone else:
https://www.nytimes.com/2020/09/22/world/asia/biden-china-election-trump.html
https://www.japantimes.co.jp/news/2020/09/29/asia-pacific/politics-diplomacy-asia-pacific/joe-biden-china-policy-us/
https://www.nbcnews.com/news/world/would-biden-get-tough-china-n1239203