1. Modest response: You can express a modest attitude, such as "He has to keep working hard, I hope he can maintain this level."
2. Thank you for your compliment: You can thank your son for his compliment, such as "Thank you for your compliment. He will be very happy to hear it. "
3. Share joy: You can share your joy about your son's writing ability, such as "We are really happy to see his progress."
No matter which way you choose to respond, make sure that the tone and expression are in line with your culture and personal style. At the same time, we should also respect other people's views and opinions.