Philippine Defence Secretary Gilberto Teodoro Jnr issued a formal warning on Wednesday regarding academic exchange programs with China. Teodoro’s comments were prompted by recent reports indicating that Chinese language teachers operating in Manila had received training from a Chinese university currently linked to controversies surrounding the Batanes Islands.

Teodoro emphasized that the government must remain vigilant, suggesting that educational initiatives could be repurposed as conduits for 'grey-zone' activities. In military and geopolitical terms, grey-zone tactics refer to actions that fall between traditional peace and open warfare, often intended to exert influence or destabilize a region without triggering a direct military conflict. The Secretary specifically cautioned that such programs might serve as platforms for state-sponsored disinformation campaigns aimed at the Philippine public or political institutions.

While the Defence Secretary’s remarks highlight a growing concern within the Philippine security establishment regarding foreign influence, the specific nature of the 'grey-zone' threat remains broad. The government has not yet provided evidence of specific illicit activities conducted by the teachers in question, but the warning signals a shift toward tighter oversight of cultural and educational ties between the two nations. This development occurs against a backdrop of heightened tensions in the South China Sea, where the Batanes Islands—located near a strategic maritime chokepoint—have become a focal point of regional security discussions.