Ningbo Zhongli Bolts Manufacturing Co., Ltd. oo la aasaasay 2003, waa soo saaraha xirfadeed ee xirmooyinka-xoogga sare ee tilmaamayaasha kala duwan ee moodooyinka kala duwan, kaas oo daboolaya aag ah oo ku saabsan 10,000 mitir oo laba jibbaaran, caasimadda diiwaangashan ee 1500,000 RMB, oo leh wadarta wax soo saarka sanadlaha ah ee 8,000 tan sanadkii. Shirkaddu waxay dhowr laamood oo iib ah ka samaysay gobollo kala duwan oo Shiinaha ah. Dhanka kale, wax soo saarka shirkadda waxaa loo dhoofiyaa Yurub, USA, Middle East, Africa, Koonfur-bari Asia iyo gobollo kale. Shirkaddu waxay leedahay awood farsamo oo xoog leh, qalab tijaabo ah oo dhammaystiran iyo noocyo kala duwan oo si toos ah otomaatig buuxa u leh saldhigyo badan oo qabow iyo mashiinno madax kulul leh, si ay kuu siiyaan alaab tayo sare leh oo la isku halleyn karo. 1, A490, boolal madax hex DIN931, DIN933, EN14399, DIN6914