What is the meaning of 開封?

to unseal, to break open a seal

(～市) Kaifeng (a prefecture-level city on the Yellow River in Henan, China, a former national capital)

breaking-open of a seal

unsealed mail

to break open a seal

Kaifeng (a prefecture-level city on the Yellow River in Henan, China, a former national capital)

hanja form of 개봉

1. breaking-open of a seal
2. first airing of a movie

breaking-open of a seal

first airing of a movie

hanja form of 개봉 (“Kaifeng”)

chữ Hán form of Khai Phong (“Kaifeng”)

Source: wiktionary.org