Previously, I thought diving in Southeast Asia, including Hainan Island in China, was extremely dangerous. However, after seeing the related reports, I was still shocked; the data is staggering. The underwater situation is incredibly complex. Many people pull out their oxygen tanks and try to extort money while diving. This is also common in Hainan, and it's been widely reported in the news. Never entrust your life to gambling with the conscience of strangers.