无论你到中国留学还是工作,都要拥有有效的签证。对外国人有几种签证类型,分别是旅游探亲签证(L)、访问签证(F)、学习签证(X)、工作签证(Z)和过境签证(G)等。办理签证时要持有效护照、两张护照照片和签证费到所在国的中国大使馆或领事馆办理。若在中国境内办理签证延期,应到当地公安局出入境管理部门办理。 You must have a valid visa to enter China for study orwork. There are several types of visas for foreigners. Theyare tourist and family visit visa (L), business visa (F), studentvisa (X), work visa (Z), and transit visa (G), etc. A basicapplication procedure is that you go to a Chinese embassy ora consutate-ovith your valid passport, two passport photos andvisa application fee. If you want to extend your visa insideChina, you should go to the local public security bureau.