Take Chinese telecommunications giant Huawei, for instance.

Earlier this year, Huawei said it was not able to strike a deal to sell its new smartphone via a US carrier, over security concerns.

The scuppered deal was just the latest example of a Chinese firm struggling to do business in the US.

Huawei hit back and said that the reason the US wanted to keep it out of the country was because it is too competitive.

But many US politicians and businesses believe that Chinese companies have been given an unfair advantage by their government.

Some also say that Chinese companies that deal in data, as Didi does, hand that data back to the Chinese government - a perception Cheng Wei is quick to correct.

"When American companies first entered China, there were also these concerns," he says.

"Whether you're Chinese or American, data is the lifeline of any business. If you can't guarantee data security, that's going to be totally destructive for the business."

Not old China