1. Check the cable for broken wires. Whether the screws of all parts of the instrument are loose, whether the parts are shaking and hidden, and lock them immediately if found. If it can't be solved, you can inform the manufacturer to handle it.

2. During use, pay attention to whether there is abnormal sound. If found, stop using it immediately, so as not to expand the damage, and notify the manufacturer to check and deal with it.

3. After use, clean the appearance of the instrument with a damp cloth, especially the part dripping with sweat stains. Conditional clubs can try water-based wax again after the test, so as to avoid paint rust. Wipe the counterweight guide rod and slide rail with water-based wax at least once a week.