1. Place important documents and valuables such as contracts, contracts, birth certificates, academic certificates, real estate certificates.

2. Place a small amount of emergency or spare cash, commemorative coins, valuable collections, or very personal items, stamps, coins, antiques, jewelry, jewelry, gold watches, etc.

3. Put personal items, personal special items, items unsuitable for others to see, etc.

4. Place items, medicines, dangerous items (such as guns), adult items, etc. that are not suitable for children.