Thai Roong Ruang Sugar Group (TRR Group) has started the business since the end of Second World War. During that period, Thailand was confronting with a sugar shortage crisis, in thereby the private sector was encouraged by the government to set up sugar factories in order to tackle the crisis. Due to the high costs of imported machinery and equipment, Mr. SureeAsadatorn, locally known as "Thao Kae Lin" and externally named as “Thailand's King of Sugar, successfully invented the equipment of sugar production by his own knowledge and skills in steel lathing without the need to import any machinery and equipment from abroad. With his patience and perseverance, the first sugar factory, called Ruamkamlarp Sugar Factory (i.e. Ruamkamlarp Co., Ltd.) was successfully founded on 7 May 1946, located at soiPrompong, beside Saen Saeb canal in Bangkok. This sugar factory is widely acknowledged as the first privately-owned sugar factory in Thailand