PATS to provide O&M services for APM system connecting Hong Kong Airport July 13, 2022 | Asia Pacific Company News, Asia Pacific News, Company News, News CRRC Puzhen Alstom Transportation System Company Limited (PATS) has signed a contract with Airport Authority Hong Kong (AAHK) to provide operation and maintenance (O&M) service for the automated p... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password