Hi Polarbear,
I also got accepted into Tsinghua and still deciding whether to go. I didn't get to apply to CEIBS because I was too late.
I think it all depends on what you want to do in the future. Tsinghua and Beida are what they call state owned university(体制内), which means it's a public school where budget and professor salaries are controlled by the Ministry of Education. Also most of their graduates goes to state-owned companies. CEIBS on the other hand is an independent school, where professors are paid a lot more and have a more business like environment.
In terms of incoming students, Tsinghua and Beida are not as diversified as CEIBS. Since most of Tsinghua and Beida MBA recruits domestic students, the IMBA is a relatively smaller program.
As for the branding and credential factor, that is also my dilemma. Tsinghua is best known for its undergraduate program, the master and PhD programs are often second thoughts for people who didn't get accepted into top US/European colleges. Of course I'm just been a bit too general, but that is generally the case.
Hope it helps you a bit. I have to reply by 5-7, so decision decision.... emmm....

@ayyada
Thanks for your response. We have probably read the same boards and sources from which you've gathered your info.
I think for one of China's flagship universities, the government won't let Tsinghua decline because of lack of funding. I am sure that the professors and staff are highly capable, and my confidence is reflected by the partnership of MIT, as well as the access to the Harvard and Stanford alumni networks. As for your concern about domestic vs. international recruitment, I have read the same problem on other forums, but the posts are dated to 5 years ago. That is a long time considering the business school's age, and it is continuing to improve very dramatically. There is an MBA program that caters to Chinese people, but I have seen the stats showing that international recruitment is fairly high, as mariner19 pointed out.

From my reading of several forums, I have pieced together a picture of the schools and where they stand in terms of branding and public perception (of course, it is merely my humble opinion):
Beida and Tsinghua are like Oxford and Cambridge, which are very old and prestigious universities with a long history of excellence in many areas, but young and above average b-schools.
CEIBS is a specialized business school like London Business School, which is an amazing b-school, but not as well known to the layman.

I don't think that Tsinghua SEM is going to get worse, and it can only continue to improve. I believe the brand will continue to grow until it matches its main Tsinghua reputation.

@mariner19
re: FT rankings - I have also considered this. I know Beida is ranked at 54, but I have also read that Tsinghua has a better IMBA program (heavily influenced by MIT), so I can't imagine it being ranked too poorly if it elected to join the ranking. I have seen that sino-manager ranking, but the one I saw was from 2008, which is 5 years ago. A lot of the easily accessible research on these schools seem to peak in that year. Is your sino-manager ranking more recent? Either way, Tsinghua is not going anywhere except up. As one of the top universities of China, I am sure it will have plenty of MNC opportunities as well. I watched the IMBA coordinator give an interview last year speaking of plans to support and cultivate more students for international businesses. This is where I think a smaller class is advantageous, as more resources can be concentrated on giving students the support they need to succeed. The alumni network won't suffer much either, because there will be access to other departments (law, politics, medicine, engineering, etc) as well as MIT, Harvard, and Stanford.

I am fairly sure that I will be attending Tsinghua as well, so I am looking forward to meeting you and becoming great friends. It's good to know a fellow American in a foreign country :D

Hi guys,
I had couple lengthy discussions with my friends who graduated from Ross(U of Michigan) and CEIBS last night, and I finally decided to accept the Tsinghua offer. You guys were right about diversity this year, the IMBA class size is reduced from 120 to 70, while retaining same number of spots for foreigners (~35).
From what I understand the main difference between CEIBS and Tsinghua is the goal of the students. CEIBS is more like traditional MBA schools, where they prepare you for a high paying job like consulting and finance. Tsinghua on the other hand is not as strong in terms of MNC company recruiting. The students went there are more local people who wants the brand of a prestige school.
I think you guys are going to love the life in Beijing. I just came back from US last year, and already consider to spent next couple years here.
Hope to meet you two in class!

Tsinghua and Guanghua are in Beijing, while CEIBS is in Shanghai. If you understand China, then you will understand the different industry/business environment in the two cities.the main difference between CEIBS and Tsinghua is the goal of the students. CEIBS is more like traditional MBA schools, where they prepare you for a high paying job like consulting and finance. Tsinghua on the other hand is not as strong in terms of MNC company recruiting.

That's a bit scary, that they figured out who you are from only 2 posts and no stat posting. I'm sure you weren't the only ABC to be admitted to CEIBS. Or was it through PM?