It’s a company at China, at first we dev software on windows and sale it, today we run am app name knowledge planets, url zsxq.com(in Chinese).

I know one of their company's products, it's https://zsxq.com/. But it came out in 2015, and I've never tried any of their other stuff.

Thanks. We build software and sale it to big companies at first,and then develop anti virus software etc.

We also try some new things such as https://note.slax.com and https://r.slax.com