Happy and smiling
It is a Chinese idiom, which means to laugh heartily. It comes from a reply to Dong'e Wang Jian.
explain
To laugh heartily.
source
Han Chen Lin's answer to Dong'e Wang Jian: "I listen to the sound of snow white and watch the festival of green water. Then I write Dongye and Ba Ren by Chi Biyi, and I can't help laughing."
Happy and smiling
hasten out of the house in a great rush - duó mén ér chū