What are the eight-character idioms in the fourth grade?

What are the four-character idioms? The first volume of the fourth grade is as follows:

1, saddle never leaves the horse, armor never leaves the body: armor, protective clothing worn by ancient people in war. A horse can only understand it if it takes off its armor. Stay on high alert.

2. Be content with the old customs and drown in the old news: customs: customs. Indulge: To indulge in or sink into. Stick to old habits and limit yourself to old experiences. Describe conformism and complacency.

3, safe and easy, the disaster comes from the mouth: easy: change, change. Peace and danger are mutually transformed, and disaster and happiness are mutually causal.

4. One hundred is not much, and one is not little: it refers to a rare good deed.

5, a hundred feet, go further: Buddhism, although the metaphor is deep, still need to practice and improve. Metaphor has reached a high level, but it is still not satisfied, and further efforts are needed.

6, the pole is not tied, the two ends collapse: the pole has no head, and the things hanging at both ends will slip.

7. Eat without plowing, dress without silkworms: plow: turn over Song Tian soil and sow; Silkworm: Raise silkworms. You can eat without farming and wear silk without raising silkworms. Describe getting something for nothing.

8. On Bagong Mountain, every grass and tree is a soldier: every grass and tree on Bagong Mountain is a soldier. Describe extreme panic and paranoia.

9. bystander judgment, the authorities are fascinated: it means that outsiders observe things carefully and carefully, while the parties are often confused.

10, Let a hundred flowers blossom and a hundred schools of thought contend: a metaphor for the free development and debate of different factions and styles of art and science.