Hong Leong Asia Ltd is the industrial manufacturing and distribution division of Hong Leong Group Singapore. It operates as the largest diversified industrial conglomerates in China and Southeast Asia. The business activities of the group are functioned under Diesel Engines, Building Materials, Rigid plastic Packaging, and Air-Conditioning Systems and other segments. The group derives the majority of revenue from the Diesel Engines segment which includes manufacturing and distribution of diesel engines and automobile spare parts. The group's operations are primarily in China, Singapore, and Malaysia.