How to divide it at twelve o'clock in ancient times

Twelve o'clock in ancient times is like this:

1, child time: (from 23: 00 to 0 1: 00).

2. Clown time: (0 1: 00 to 03: 00).

3. Yin Shi: (3 am to 5 am).

4. Shi Mao: (05: 00 to 07: 00).

5. Date of birth: (07: 00 to 09: 00).

6. Sixi: (09: 00 to 1 1: 00).

7. At noon: (from 1 1 to 13).

8. Out of date: (from 13 to 15).

9. Application time: (from 15 to 17).

10, unitary time: (from 17 to 19).

1 1, when: (from 19 to 2 1).

Shihai 12:(2 1 point to 23: 00).