Twelve little, healthy academic language. Refers to 12 the requirement that controlling emotional changes is beneficial to health. Instead of "12 years old or older". Xiao Youjing was quoted in the Book of Nourishing Life: "Thinking less, thinking less, wanting less, talking less, laughing less, worrying less, being happy less, being angry less, being good less, and being evil less are the capital of health preservation.