For visitors who need an entrance visa to visit China, a tourist visa is the easiest to apply for, as far as we are aware of. If you, however, need to apply for a visa for an academic visit, please send the following information to yaojie[at]pku.edu.cn (Att: Ms. Jie Yao). Once received, an official invitation letter for a visa application will be arranged and sent to you. Please allow for at least one month for the process (it may take much longer in February, July and August, when the University closes for term break).
Information of accompanying persons:
Please refer to the following site for more information: http://www.passportsandvisas.com/visas/china-visa-faq.asp for Chinese Visa FAQs. If you do encounter problems obtaining a visa, please don't hesitate to contact us: zhangn[at]pku.edu.cn.