Go to http://sciencespo.topapply.com/bama Create an account. With this account you can access the programme "Peking University". You fill the application form e.g. : - personal details - contacts details - programme choice - personal statement (please explain why you are applying to this master and this concentration in particular, it's very important)
You have to attach (upload via Website):
- your updated CV (Resume) - All transcripts (english) of higher education, including the current academic year
You first create a file in your computer for those documents and then upload the files.
All this is very simple and you shouldn't meet any difficulties.