The 4th International Symposium on Transportation Infrastructure/Materials & National Asphalt Pavement Constructions/Maintenance Technology was held in Jinan, China on 2 July 2019. Sze Wai Pan, the Chairman of Freetech, as well as other famous experts and scholars, such as Bjorn Birgisson, the academician of the Royal Swedish Academy of Engineering, Wang Fuming, academician of the Chinese Academy of Engineering, and Xu Xiaohong, Chairman of the Shandong Highway Society, and etc, attended the meeting and conducted speeches during the conference.