a. Bitmain does not 'make' chips and certainly do not sell them to 3rd parties. BM contracted TSMC to manufacture their chips.
b. The T1 chips were designed for Halong by Innosilicon and made by TSMC. Considering that very shortly after the release of the T1, Inno released their own version (the T2) that uses the same chips it all rather smacks of the kerfuffle in 2014 regarding the 28nm A1 chip that Inno designed for Bitmine.ch
c. As Sidehack as mentioned a while back, yes he is in talks with Inno about the chips.
Of course when i say BM i wasn't implying they manufacture them themselves, and even if they did, it wouldn't change anything. I don't see the point of arguing that. You could also say BM's chips were designed by the guy that left for MicroBT, that Bitmain does nothing but buys everything, but that's beyond the point of this topic.
All i wanted to know is whose chips Halong used, and its Innosillicon's chips, thanks for the answer.