email them your CV, after screening, you will be invited to an individual interview which the HR head and one consultant would be present, you will get the offer at around 1 week later.
I applied online. The process took 2 weeks. I interviewed at Boston Consulting Group (Peking, Peking) in Nov 2014
Interview
One on one interview at BCG office. Conducted by a senior recruiter with resume. Basically fit question and little case question. The case is not difficult, but require key ability to solve problem and think logically.
I applied through college or university. The process took 3 weeks. I interviewed at Boston Consulting Group (Peking, Peking) in Feb 2015
Interview
First contacted the HR. Standard process. Talked about industries I'm interested in and why BCG. Then of course case interviews. Later four rounds of interviews in total with increasing difficulty. Eventually talked to some partner.