What is vicissitudes, generation after generation 120 years?

Vicissitudes 120 years are passed down from generation to generation, which means that it has experienced 120 years of wind and rain, and knowledge and technology have also been passed down 120 years. According to relevant public information, vicissitudes of life refer to people who have experienced Qian Qian's untold sadness and ups and downs on the road. Double Jiazi is two Jiazi, one Jiazi is 60 years and the other Jiazi is 120 years. Passing on from generation to generation means that knowledge and skills are passed on from generation to generation, or teachers and students give and accept endlessly, or the inheritance of race, descent and cultural spirit is endless, lasting for 120 years, meaning 120 years. This sentence is generally used for120th anniversary celebration.