Hello, I am currently in Guangzhou on a double entry L tourist visa. I plan to stay for around 3 months here. I first entered China on February 1, 2011 and I still have about two weeks (till March 1) before I have to leave China. My question is, I heard that you can apply for an L visa extension without leaving China. Is this true? Most people suggest to just go to HK or Macau and come back, but what's the difference if I extend my L visa here? I was thinking if I can extend without leaving China, I can keep my second entry for future use. Or does the visa extension will replace my current double entry visa? Would really appreciate for any advice. Thank you.