A long-term investor must adhere to their investment principles

1. Staying alive is more important than anything else, always protect your principal.

2. Only God knows what tomorrow holds; only earn the dividends provided by the trends of bull and bear cycles.

3. Don't take risks to eat the fish head and tail; those who buy are apprentices, while those who sell are masters. Learn to reduce your desires, take profits when they are good, and be content to find happiness.