About us:
Parent Company 
R&H Development Group Limited：
Subsidiary: Zhuzhou Daneng Science & Technology Co. Ltd.
Main Business: Railway related electronics, machineries, complete sets of Equipments

Subsidiary: Guangzhou Doop Electronic Co. Ltd.
Main Business: Automobile HID

Subsidiary: Guangzhou OttoPlus Construction Technology Co. Ltd.
Main Business: New Constructional Materials, Indoor Heating Equipments

Subsidiary: Guangzhou OttoPlus Auto Parts Co. Ltd.
Main Business: Parking sensors and onboard cameras

Subsidiary: Otps lighting co,ltd
Main Business: Brand HID