Chinese suppliers/providers are generally all considered backdoored.
One firm I worked with used HIKVision cameras and found them all backdoored. Even worse, the Chinese 'flood' the market with 'acceptable' quality stuff at a very low price so everyone gets on board and installs the backdoored stuff. This is by design, most of these firms are partnered or even owned by the Chinese Govt.
A year and a half ago the lab where i worked purchased a bunch of 'Smart' crap from Amazon then tested them. About 89% of them were side-channel dumping data to Beijing. They'd have legitimate activity to AWS or Azure buckets, then dump auxiliary data into China. It is important to realize that if you use Chinese products/services you are likely backdoored. Chinese has the biggest spying operations in the world, even dwarfing the US Govt/Contractors in some cases. China's thirst for any relevant data is immense and unrelenting.
What that data is used for is even more surprising, varied, and impressive. Intellectual property theft is incredible, they have almost no innovation and almost everything is rooted in the theft of IP at the expense of quality, security, privacy of whatever the end product resulting is.