YANCHANG PETROLEUM.YANCHANG PETROLEUM was incorporated in July 2006 with a registered capital of RMB 217 million and is headquartered in Xi'an. YANCHANG PETROLEUM's business scope encompasses the production of petroleum tubular products (oil tubing, casing, drill pipes, sucker rods), precision composite strips, and precision alloy materials. The company occupies a total area of 582 mu (339 mu at the Xi'an headquarters base and 243 mu at the Ganquan base), equipped with over 220 sets of main and auxiliary machinery, 36,000 square meters of warehouse space; It operates 10 oil (casing) pipe production lines with an annual production capacity of 410,000 tons for oil and casing pipes, 14,500 sets of various high-pressure wellheads, 1,500 sets of surface skid-mounted products, 8,000 sets of instruments and meters, 1,000 tons of precision alloy cold-rolled steel strips, and an annual composite strip billet capacity exceeding 2,000 tons. Primary products include: oil tubing, casing, hydraulic presses, CNC lathes, and threading machines.