A long-term investor must adhere to their own investment principles

1. Surviving is more important than anything else; always protect your principal.

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

3. Don't take risks to eat the fish head and fish tail; those who buy are apprentices, while those who sell are masters. Learn to lower your desires, take profits when they're available, and find contentment.