A 15-hour stand-off between Chinese and South Korean vessels unfolded in the Yellow Sea's Provisional Measures Zone last month, according to a Centre for Strategic and International Studies report. Chinese coastguard vessel 6307 and two other ships shadowed South Korean research vessel Onnuri near Beijing's Shen Lan 1 and Shen Lan 2 aquaculture platforms, with China having interfered in 27 out of 135 South Korean maritime surveys since 2020 and installed 13 ocean observation
