越看越覺得水下伏擊區這猜測可能是真的。

[ Detecting foreign underwater activity in and near the shallow Bashi Channel offers arguably the best and first line of defense against any foreign submarine intrusions, before they are able to reach the PLA’s South China Sea “bastion.” As part of China’s anti-access strategy, the control of the entrance points – straits and channels – is of critical importance. In the big picture, therefore, it is not surprising that Chinese aircraft patrol frequently near the Bashi Channel in the south and Miyako Strait in the north. For these reasons, China is likely to continue or, even, increase its maritime surveillance activities within the southwestern part of Taiwan’s ADIZ, near the Bashi Channel, and other critical sea lines of communications along the first island chain in the future, regardless of the geopolitical status of Taiwan.]

https://thediplomat.com/2021/06/understanding-chinas-aerial-incursions-into-taiwans-adiz/