Deqing Fengrun Electric Light Source Co., Ltd., established in 2001, is a leading professional manufacturer of hard explosion-proof infrared heating bulbs, infrared therapy bulbs, heat preservation bulbs, heat preservation lampshades, and carbon fiber heat preservation panels. The factory covers an area of 14 mu (approximately 9,333 square meters), with a construction area of 10,000 square meters, and employs 130 staff members. It possesses four high-quality semi-automatic production lines (not low-quality high-speed automatic production lines) with a standard daily output of 40,000 bulbs. Two assembly lines produce 5,000 sets of lampshades daily. If a type is , it should be directly output as .