The study investigates the effects of hybrid working, where employees work from home two days a week, on employee retention and performance. A six-month randomized control trial was conducted among 1,612 employees at a Chinese technology company. The results show that hybrid working improved job satisfaction and reduced quit rates by one-third, particularly for non-managers, female employees, and those with long commutes. There was no significant impact on performance reviews or promotion rates over the next two years. Additionally, managers' perceptions of the negative impact of hybrid working on productivity improved significantly after the experiment, converging with non-managerial employees' views. The findings suggest that hybrid working can be beneficial for organizations by reducing attrition and enhancing employee satisfaction without negatively affecting performance.The study investigates the effects of hybrid working, where employees work from home two days a week, on employee retention and performance. A six-month randomized control trial was conducted among 1,612 employees at a Chinese technology company. The results show that hybrid working improved job satisfaction and reduced quit rates by one-third, particularly for non-managers, female employees, and those with long commutes. There was no significant impact on performance reviews or promotion rates over the next two years. Additionally, managers' perceptions of the negative impact of hybrid working on productivity improved significantly after the experiment, converging with non-managerial employees' views. The findings suggest that hybrid working can be beneficial for organizations by reducing attrition and enhancing employee satisfaction without negatively affecting performance.