On the one hand, you should show the propensity to consume as much as possible. More importantly, it is necessary to point out that you have a relationship that you can't give up in China. For example, the business at home will be handed over to you soon. For example, if you want to buy a bunch of things to return to China, the most important thing is to buy something for your parents as a birthday present. In the eyes of visa officers, family and career are the hardest things to give up.
By the way, it's better not to apply for a visa together. You can do it every other week, which is less likely to arouse suspicion and easier to pass.