use the door fingerprint button.
The old Big Dipper has an automatic lock function. You only need to hire your personal fingerprint in advance, and then you can directly press the fingerprint button on the door to lock the door without using the car key.
The old Big Dipper is a multi-functional mini-car jointly developed by Changhe Suzuki Company and Japan Suzuki Company. It is equipped with a 1.4-liter engine, which has good performance and low fuel consumption.