開封

Etymology
As a district and city in Henan, named in the late 8th century BC by the Zhuang Duke of Zheng as he settled new territory.

Verb

 * 1) to unseal, to break open a seal

Noun

 * 1) breaking-open of a seal
 * 2) unsealed mail
 * 1) unsealed mail

Verb

 * 1) to break open a seal