In fact, there is not much difference between A and B+. It's all about finding a job anyway. Maybe you will develop in the place where you go to school in the future, so you should consider a very important factor, that is, the region.
Universities in China are all regional except Tsinghua and Peking University, which are generally accepted by the whole country. If you want to develop in Jiangsu and Zhejiang, it is definitely better to enter Zhejiang University, while Xiamen University is not as popular as Zhejiang University. If you want to stay in Fujian in the future, Xiamen University will do.