Recently, after the construction of Yan-Chong Highway (Beijing section), the road to Winter Olympics venues, was completed, NavInfo, as the high-precision map provider, had participated in L4-level autonomous driving and car following fleet tests based on C-V2X vehicle infrastructure cooperation technology in the scene of long tunnel-contained two-way four-lane highway, together with partners such as Huawei, Audi China, Beiqi Futian and TuSimple.