premise: The Chinese government has announced plans for 18 patented technology exhibition and trade centers, to promote patent application and implementation.
  The centers will be set up in cities of Beijing, Shanghai, Tianjin, Wuhan and Chongqing. They will conduct exhibitions, trade and promotions of patented technology, daily patent management and carry out training in patent brokerage, and intellectual property protection.
  "The centers will form a trade platform for amateur inventors, medium-sized and small enterprises and investors," said Zhang Qin, deputy director of the State Intellectual Property Office, on Friday.
  The slow development of a patented technology market and lack of trustworthy agencies led to difficulties in the application and implementation of patents in China, said Zhang.
   What led to difficulties in patent application and implementation in China?
hypothesis: slow development of a patented technology market and lack of trustworthy agencies