A China Coast Guard flotilla conducted law-enforcement training featuring water cannons, drones, and optoelectronic evidence collection in waters around Second Thomas Shoal and Sabina Shoal.

The overlapping territorial and maritime claims in the South China Sea, principally between China and Southeast Asian states including the Philippines, Vietnam and Malaysia, encompassing disputed islands, reefs and shoals, and the naval, coastguard and diplomatic confrontations arising from them.