SHANGHAI, July 18 (Reuters) - Hengheng's friends could tell she was enjoying her birthday party in the pricey, health-conscious restaurant in downtown Shanghai by the way she licked her food off the plate. "If my dog is happy then I am happy. China's pet economy was worth 493.6 billion yuan ($69 billion) last year, a 25% increase on the previous year, according to data from research firm iiMedia Research. It is expected to reach 811.4 billion yuan by 2025. ($1 = 7.1867 Chinese yuan renminbi)Reporting by Casey Hall; Editing by Conor HumphriesOur Standards: The Thomson Reuters Trust Principles.

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Persons: Hengheng, Tiffany Wang, Ma Tao, It's, Casey Hall, Conor Humphries Organizations: Border Collie, Dog, iiMedia, Thomson Locations: SHANGHAI, Shanghai, China