Its too early to talk about chinese card now. Chinese did not side with BD in 1991 standoff with Myanmar. Dont forget that.
Also we never had any strategic relationship with Chinese. I mean never. No matter what you say, BD under all govt never wanted to irk India by engaging itself with any kind of defence ties with any country. Now under this circumstances why would China support us instead of Myanmar? The best we could expect from them is to stay neutral.
There are few members who suspected that China will turn away from us if we engage ourself with India. But the irony is, Myanmar is licking Indian feet for quite some time now. They even have more defence co-operation with India than Chinese, at least getting free stuffs and all. Still Chinese favoring Myanmar than us or may be its hypothetical.
What BD is doing now is quite smart. They are more into practical diplomacy. Just follow the following observation.
1) After coming to power, AL first sent its envoys to China assuring them or expecting them to continue their support towards BD. Abul Hossain tried hard for Rail Link to China via Myanmar. Also BD asked more than 4 billion dollar from China. which clearly showed intention.
2) BD as usual is favoring Chinese companies to lead infrastructure projects.
3) With India, BD is doing great regarding carrot diplomacy. India will not get direct transit through BD but will get rail and water. For direct transit they may wait another 10 years.
4) BD sent maritime boundary issue for arbitration which is great as they knew there will not be any outcome through bilateral discussion. So why to waste time.
5) BD also did great with Uncle Sam. They are giving us 21 Sea vessel for our Navy. Not a bad deal.
The above observation made me to think that BD is in the right direction. But failed miserably with Myanmar. I still dont understand why after Dipu Moni's visit to Rengoon they still remained as hostile as they were one year before.