- I am the youngest and Lao Wang is the oldest. Dr. Li is the second oldest. Lao Wang is 84 years old; Lao Li is 79 and I am 77.
- He is about 40 years old. When did he start being my apprentice? Maybe when he was 18, 19 or 20. I think he was not 20 yet. (Is he 45 now?) Yes, he is over 40 now. He had not been 20 when he started being my apprentice. He has been my apprentice for a long time and now he is over 40.
- Doctor Li is 79 years old. He is the oldest one among us. Lao Li is the second oldest and I am the third oldest. We are like brothers.