When a coach at a swimming pool in Zhengzhou was training to hold his breath, his brain was deprived of oxygen due to holding his breath for too long, and his body lost control. The photographer did not see any abnormalities and marveled at the coach's ability to hold his breath. When the coach sank into the water, the photographer called for his There was no response to my name, and other colleagues didn’t see anything unusual when they entered. They were slow to respond and were talking and laughing throughout the process.