You can download it in the "Office Area and Form Download" column on the homepage of China National Intellectual Property Administration website. (10003 1 Processing file copy request)
Mail it to: Business Problem Management Office of the Preliminary Examination and Process Management Department of China National Intellectual Property Administration Patent Office, No.6, West Tucheng Road, Jimenqiao, Haidian District, Beijing (hereinafter referred to as the Problem Office of the Preliminary Examination Department of the Patent Office) with postal code: 10088.
Tel: 0 10-62084247, 0 10-62084248.