1. Check the packaging: after receiving the goods, first check the packaging to see if the plastic bag is damaged, if it is damaged, please replace it in time;
2. Sealed preservation: be sure to tie or seal the plastic bag, can not enter the air, otherwise it is easy to oxidize and rust;
3. Use attention: try not to touch directly with hands, especially in summer, there is hand sweat, let alone directly contact with hands, otherwise it is easy to rust;
4. Storage location: put in a dry environment, once wet it is easy to rust;
5. Check often: if you do not use it for a long time, check it frequently to see whether the anti-rust oil is less or even dry, and supplement the anti-rust oil in time, otherwise it is easy to produce dry stains or rust;