问候 Greetings

Zao Shang Hao 早上好 - Good Morning
Xia Wu Hao 下午好 - Good Afternoon
Wan Shang Hao 晚上好 - Good Evening
Wan An 晚安 - Good Night
Dajia Hao 大家好 - Hello Everyone
Lao Shi Hao 老实好 - Hello Teacher
Shang Wu Hao 上午好 - Nearly afternoon (greet)
Zhong Wu Hao 中午好 - At noon (greet)