Shenzhen Xinglong Technology Co. , Ltd. (stock code: 830924) was established in 2004. It is a high-tech enterprise specializing in R&D, production and sales of new energy and smart substation testing (certificate number: GR201844202377) ; company Since 2004, it has developed a three-phase programmable standard power source. For the first time, the waveform fitting degree has been improved from the original domestic highest of 3, 600 points per week to 80, 000 points per week. Its harmonic performance is comparable to the world's top electric energy testing product FLUKE. Comparable to 6135. This product has been widely used in electric power, electronics, quality inspection and other enterprises and institutions. Since 2008, the company has cooperated with the Electric Power Research Institute of Guangdong Power Grid Corporation to research digital substation-related detection technologies. The project was completed in 2009 and was identified as an internationally leading one by expert. . .