Video and photo imagery emerged on the internet on 25 May, showing Chinese-manufactured military vehicles being unloaded from a cargo ship at Sihanoukville Port in Cambodia, particularly truck-mounted artillery systems.
The Royal Cambodian Army primarily received SH1 155mm truck-mounted howitzers as well as AR2 300mm and Type 90B 122mm multiple rocket launchers (MRL). Chinese state-owned Norinco produces all three weapons.
These artillery systems were accompanied by other vehicles such as ammunition transport trucks and Xiaolong JL3 (FJ2040) 4×4 tactical vehicles. At least five of the latter probably serve as communications or meteorological vehicles.
In full: https://www.shephardmedia.com/news/landwarfareintl/cambodia-boosts-artillery-firepower-with-chinese-help/