How often does Chengdu Social Security raise funds every year?

Chengdu social security adds money once a year. In the past, social security was adjusted every two years. With the rapid economic development in recent two years, in order to adapt to the current situation, it has been adjusted once a year. Chengdu is also nationwide. According to the regulations, it can only be adjusted once a year. Therefore, Chengdu social security will increase money once a year.