Not saying they don't do such things, but the evidence is lacking.
Wumaos are low-paid grunts and sincere idiots who disingenuously downvote, report and post irrelevant nonsense regarding racist imperialist AmeriKKKa or legitimate Chinese clay/territorial waters/6000 years of peaceful history. This is very easy to see. You're free to suspect any interlocutor as being one, of course, but if that's your only retort, you'd do better not stooping to the level of an undeniable propagandist and instead conceding the object-level issue – or keeping silent.
a.k.a. please don't feed the trolls
The proof amounts to essentially one sentence spoken by an unnamed source
> U.S. officials said Huawei has built equipment that secretly preserves its ability to access networks through [lawful intercept interfaces]
but I understand that source confidentiality is useful so if WSJ trusts that, perhaps so should I. Not sure I'd then go so far as to independently say it has been "proven" when all that I truly know is that someone else believes someone else who has a commercial interest in saying this. It's probably true but that's not the same thing
If you'd please review https://news.ycombinator.com/newsguidelines.html and stick to them when posting here, we'd appreciate it.
Here's a link to one such article proving that Huawei networks are backdoored: https://www.cnet.com/tech/mobile/us-finds-huawei-has-backdoo...
And an original source article in WSJ: https://www.wsj.com/articles/u-s-officials-say-huawei-can-co...