Tencent Reading Space is fully open.

QQ Reading Space is still a new player in the online reader market. The old players include Google Reader, xian guo, and zhua xia. NetEase also has its own online reader - Youdao. The competition in this market is pretty sufficient. Generally, I still prefer the products from Google and Tencent. No matter what they copy or don't copy, being useful is the hard truth.