Hangzhou duonuo Co., Ltd. was founded 25 years ago in 1986. That's why work and experience have become our most important skills. The company currently employs more than 300 people and has an annual output of more than one billion yuan. This is an ISO9001 quality assurance system, ISO14001 environmental management certification. Thanks to all this, my business is more competitive. Build strong relationships with the best domestic and foreign companies. The main current products are as follows.