How does the yangg lockdown work? How much is the yang's lockdown fee? The youngg locking company ltd., nakayama city, was founded in july 2000 as a high-tech firm focusing on the integration of mechanical and electrical intelligence locks. It is one of china's technical standards for quality and industry standards, and is a member of the chinese association of the defence and safety industry, a supplier of the shanghai world expo in 2010, a supplier of the guangzhou asian games in 2010, a supplier of the 26th world summer games for university students in shenzhen in 2011, a supplier of the nanning asean expo, and a winner of the 2011 silver award for the great five-kinse for industrial designs in mountain city. It has more than 100 offices and agents in the country. Products are widely distributed in the united states, russia, the middle east and south-east asia. The main product series of the company: the hotel smart lock series, the smart lock series, the cartoon smart lock serie...