I would barely trust Lenovo if I had completely wiped the drive, and even then I'd be wary. Huawei is a whole different animal. I wouldn't allow a Huawei device in my home or office unless it had the battery removed and it was enclosed in a Faraday cage.
I just recently bought a Lenovo for someone close to me. Would you mind elaborating on why you say this about them, and if you really think they can be made somewhat privacy-safe for general use?