As of today, General Motors has officially declared that Sichuan Tengzhong Heavy Industrial Machines Co., Ltd. (try saying that ten times fast, I'll wait) won't be buying the Hummer brand after all. If you don't recall, Tengzhong is the Chinese company that thought it could make the Hummer business work in today's world.
There are many rumors to as why China officials would not support the transaction including Beijing's political agendas and environmental concerns (wait, Hummer's aren't efficient and green?), but fact is, the proposed deal is dead.