1 Old HSK word(s):

☊上空 ** D

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

上 top / superior, highest / go up, send up

空 empty, hollow, bare, deserted

Hsk Characters:

HSK -Characters and beyond:

Gb	Big5	Eng	Rad	Mega	Triple	Multilingual

Luftraum (S) [shang4 kong1]

上空