What is the reason for the sharp decline in Suining Bethel's income in 2021? Will it get better this year? Thank you

Bethel: Hello! Suining Bethel's main service customers are Changan Automobile, Chengdu Geely and Dongfeng Xiaokang. Due to the adjustment of the customer's product structure in 2021, Suining Bethel's revenue in 2021 has declined. At present, the customer's production capacity and product structure have been adjusted, and Suining Bethel's revenue has shown an upward trend. Thank you for your attention!