"Lanyou" is mainly engaged in the production and sales of brand optical fiber grinding production equipment of Lanyou and Lanoucomto, optical fiber precision end detector, optical fiber grinder, optical fiber terminator, optical fiber OTDR optical time domain reflectometer, optical fiber cleaning series instruments, optical fiber fusion splicer, optical fiber pre termination system, data center high-density optical fiber cabling system and other optical fiber products for marketing, which can be designed and customized for customers. Perfect optical fiber distribution system products are widely used in the field of communication transmission, China Mobile, China Telecom and China Unicom```