Xi is wasting time if he bother to meet/call again.
The Biden's main point for said call is just for domestic political brownie point and expecting China is warm up just because of tariff removals. That is just plain wrong. It just like asking others to reward you just because you stop hitting them.
The tariffs should be removed FIRST, then US will have to make a permanent concession(e.g Taiwan) to make up for the loss before relation can be on equal ground, after which the US will then have to show the benefit they are willing to offer China in order for China to react mutually.
If Chinese politicians keep on behaving naively by giving up opportunities for strategic gain, then they deserve it big time when 中华民族伟大复兴 fails.