is there a primer somewhere on the security/privacy considerations of deepseek?

For the phone app does it send your prompts and information to China?

OpenRouter says if you use them that none of their providers send data to China - but what about other 3rd parties? https://x.com/OpenRouterAI/status/1883701716971028878

Is there a way to host it yourself on say a descent specd macbook pro like through HuggingFace https://huggingface.co/deepseek-ai/DeepSeek-R1 without any information leaving your computer?