Stak Inc. engages in the research, development, manufacturing, and sale of oilfield-specialized production and maintenance equipment. It offers oilfield vehicles, such as oil pumping trucks, oil-well repair trucks, fracking trucks, well flushing-wax removal trucks, boiler trucks, and other maintenance vehicles; and oilfield-specialized production and maintenance equipment, including well repair equipment components, fracking equipment, well cleaning and wax removal equipment, oil collection equipment, boiler equipment, and other oilfield-specialized production and maintenance equipment. The company also provides automation solutions services, including software development, training, debugging, and other services for oilfield-specialized production and maintenance equipment. Stak Inc. was founded in 2020 and is based in Changzhou, China. STAK Inc. is a subsidiary of Lanying Capital Ltd.