In order to fully implement the spirit of the Third Plenary Session of the 20th CPC Central Committee, implement the work deployment of the Municipal Party Committee and Municipal Government for the "Year of Project Deepening", Jinan Public Transport is committed to advancing the development of the Tonglian SONGZ air conditioning assembly production line, demonstrating new achievements in strengthening, supplementing and extending the industrial chain. On August 21, a ceremony was held at the Jinan Public Transport Sun Village Comprehensive Maintenance and Repair Base to mark the commencement of production for the Tonglian SONGZ air conditioning assembly production line and the successful roll-off of the first batch of air conditioners. .