|Copyright 2015, The Associated Press|
The 14 photos were posted on the Foreign Ministry's website Wednesday, one day after Japan complained about the activity in its annual defense white paper.
Both countries claim a group of small, uninhabited islands in the East China Sea known as the Senkaku in Japanese and the Diaoyu in Chinese.
The Chinese work is limited to its side of a median line that divides the waters, and China says its exploration is "justified, reasonable and legitimate."
Japan maintains that the activity violates a 2008 agreement to develop natural resources jointly.