Charles Thépaut & Jomana Qaddour plausibly argue that the US should view renewing the cross-border aid resolution to northern Syria as not only a humanitarian priority, but a strategic priority as well.

They also call on the US to increase its diplomatic pressure on Russia to renew cross-border aid without giving serious reconstruction or normalization concessions to Assad.

Source

Are you aware of work that looks into China's stance? Or is it safe to assume that it's all about Russia?