Yahoo! news reports an article from the AFP making note of Japanese school books being seized by Chinese authorities for depicting a map of China and Taiwan in different colors.

Customs officials in northeast China’s Dalian city have seized books sent to a Japanese school because they depicted Taiwan as a separate entity from the mainland, a Japanese embassy spokesman said.

"As far as we know from the concerned people, the issue was over maps which depicted China and Taiwan in different colours," Keiji Ide told AFP.

…The school, an elementary and middle school for children of Japanese businessmen, had to pay a small fine, he said.