Dear all,

I got the invitation letter of duly authorized unit mentioned that I got 90 days for 1 entry. I went to Hong Kong to apply for it. Then, I got only 30 days.grrr..!! and they said that I can extend it in the local bureau in CHina. So is it possible to extend it without leaving china? and do I need to get another invitation letter of duly authorized unit? could someone tell me what are the document required to extend it for only 3 months in china. Thanks for advice.