English: Overall of University of Nanking Middile School from 1925 to 1926. The building from left to right is: west teaching building, dormitory, bell tower, chapel, and east teaching building.
This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country (中国) on the URAA date (1 January 1996).
关于其背景信息,参见非美国版权之解释。 Chinese photos are protected for 50 years from publication or creation if not published.