A sign with an anti-China message has been hung at North Korea’s Gang Gun Military Academy, a conservative South Korean daily reported on Monday.

The source used by the Chosun Ilbo newspaper, however, was unnamed, a practice for which it has been criticized in the past.

Gang Gun Military Academy, the site where the sign, reading “China is a betrayer and is our enemy” was allegedly hung, is one of North Korea’s higher military education institutions, nurturing high-level generals.

However, the move would not be unprecedented at the academy and the report came as South Korean President Park Geun-hye has met Xi