Meaning of dǎ zhāo hu:
dǎ zhāo hu
打招呼
Verb
to greet sb by word or action; to give prior notice
Tā kàndào lǎoshī shí, zǒng shì huì qīnqiē de dǎ zhāohū.
他看到老师时，总是会亲切地打招呼。
Whenever he sees the teacher, he always greets warmly.
Tā tíqián lái shì yīnwèi tā yào hé wǒmen dǎ zhāohu.
他提前来是因为他要和我们打招呼。
He arrived early because he wanted to give us prior notice.
