According to the statistics of Patent Prosecution Highway (PPH) provided by CNIPA, by the end of December 2019, CNIPA has received 37,265 PPH requests, including 27,448 National-PPH requests and 9817 PCT-PPH requests.
[Number of PPH requests with CNIPA as the Office of Later Examination]
The applicants used 16,423 work product from the JPO, 12,461 from the USPTO, 4,697 from the EPO, 2,416 from the KIPO, 360 from the German Patent and Trademark Office and 202 from the Intellectual Property Office of the United Kingdom.
It took an average of 2.3 months from filing a PPH request with the CNIPA to the first action. Average Pendency from PPH Request to final decision (i.e. granting or rejecting the case) was 10.3 months.
According to the statistics of PPH data provided by other countries, 8,353 PPH requests were made using the work product of CNIPA. Among them, 5,245 PPH requests were filed with the USPTO (accounting for 62% of the total requests), 805 were filed with the EPO, 767 were filed with the JPO and 650 were filed with the KIPO, 76 were filed with the German Patent and Trademark Office and 94 were filed with the Intellectual Property Office of the United Kingdom. Source: https://www.jpo.go.jp/toppage/pph-portal-j/statistics.html