What does the word "true" commonly used in the Book of Changes mean?

1. Firm moral integrity: loyalty ~ unswerving. Firm ~ unyielding. ~ section. ~ Shi (loyal minister).

2. The moral concept of binding women in the old ethical code means that women don't remarry. : ~ female. ~ fierce. ~ Fuck (same as "chastity"). ~ Shu.

3. Zhan, Bu, ask Bu: ~ Bu.

4. It is the same as "chastity" and "sweetness" in ancient times.