When the man found Ms. Lin's lost ring, he subjectively thought it was worthless, so he lost it, resulting in the loss of the ring. According to relevant laws, Ms. Li should be compensated. Although the man threw away the ring, he didn't benefit from it. However, the man's throwing away the ring directly led to the loss of the ring, and his behavior was also at fault, so he should be responsible for his behavior.
After the man found the ring on the shelf of the gym. If he doesn't get rid of it, it's right to wait for the owner of the ring to come back and find it himself, or give it to the gym staff, or keep it properly, but he didn't contact the owner. Did not give the ring to the relevant departments, and took the ring for identification without authorization. I thought the ring was made of plastic and worthless, so I threw it into the trash can. His possessiveness is very obvious. The suspicion of unjust enrichment is inevitable.
In short, there is a legal obligation to return the lost property of others. The man found the lost ring because he misjudged that it was worthless and threw it into the trash can, which directly led to the loss of the ring. Therefore, being awarded compensation is also in line with relevant laws and regulations. People should also pay attention to this incident, and other people's lost property should not be privately owned, let alone discarded at will. The above legal provisions do not apply unless abandoned by the abandoned person.