interjection of wonder, shock or admiration

hey! / (interjection used to attract attention or to express surprise or disapprobation)

(particle equivalent to 啊 after a vowel, expressing surprise or doubt)

(pronoun) this; these / (bound form) this; the (followed by a noun) / (bound form) this; these (followed by a classifier) (in this sense, commonly pr. [zhei4], esp. in Beijing)