Questions regarding of Chinese tourist visa

Cheng, I am afraid that you may not apply in Switzerland. Chinese embassy there requires the applicants to provide resident permits. I don't think you have one, right?

Actually, you can apply one from the CVASC branch in your country. It's possible that you just get a single entry L type with the validity of three months and the duration of stay of 30 days. It doesn't matter. You can enter before it expires. Then you can try to extend it for another 30 days at least 7 days before the duration ends.