China’s Southern Theater Command said it organized front-line naval and air forces to closely monitor the Philippines’ joint air patrol BEIJING: China’s military said the Philippines has “stirred up trouble” in the South China Sea by conducting a joint air patrol with “extraterritorial countries” and then openly hyping it up. China’s Southern Theater Command said it organized front-line naval and air forces to closely monitor the Philippines’ joint air patrol on Monday, and that troops “maintained a high degree of vigilance to resolutely defend national sovereignty.”