The resurgence of the 70-hour workweek, particularly in Silicon Valley's AI startups, is raising alarms about employee burnout and sustainability. Originally rooted in China's 996 work culture, which mandated long hours for rapid economic growth, this model is now being revived in the U.S. as companies race to innovate in artificial intelligence. Startups like Rilla and Cognition are openly advertising 70 to 80-hour workweeks, while even established firms like Google suggest that 60 hours may enhance productivity. However, research indicates that extreme work hours can lead to severe health risks and diminished cognitive performance. Many younger workers are rejecting this culture in favor of work-life balance, prompting a need for employees to set boundaries and understand their rights. Companies that prioritize employee well-being and leverage AI to enhance productivity rather than extend hours may find a competitive edge in talent acquisition.