"What blush with shame? Full of energy. Why is it yellow again? Wax in cold weather. " What do you mean?

This is (novel, Lin Yuan) a joint code word with the bandit mountain carving in the Peking Opera "Taking Tiger Mountain Outward". A watertight question and answer is a way to identify mountain carvings. Yang Zirong successfully passed and was able to infiltrate the enemy's interior for undercover.

If you are a person who doesn't know the inside story and want to go undercover, when he asks "What are you blushing about", you will surely panic, thinking that he has seen through you, or that he has missed the trap (blushing), but Yang Zirong knows the inside story and is very calm, so he flatly answers "refresh" and then asks "Why is it yellow again", which is further exploration, Yang Zirong said confidently.