The sword of the previous dynasty beheaded the official of the current dynasty.

I can't see the yellow calendar of the old imperial calendar.

I can't understand the yellow calendar of the old imperial calendar. Past experience and methods can't be used to deal with present problems. The words "the sword of the former dynasty beheaded the officials of the current dynasty" and "the yellow calendar of the old imperial calendar is out of sight" remind us to constantly learn new knowledge, update our concepts and keep up with the times. Only in this way can we better serve the people and make greater contributions to the development of society.