This is bluetooth (BLE) Gatt protocol for Lenovo HS11 Smart weight scale. It uses Chipsea CST34M97 chip, similar to some Huawei scales.
Main service = 0000fff0-0000-1000-8000-00805f9b34fb
Send command Characteristic = 0000fff1-0000-1000-8000-00805f9b34fb
Receive data Characteristic = 0000fff4-0000-1000-8000-00805f9b34fb