CIQ is short for China Entry-Exit Inspection and quarantine 

“The General Administration of Customs of the People’s Republic of China (GACC), the headquarters of China Customs, is a key border agency of the nation. Following the government restructuring in 2018, China Customs now boasts 100,000 staff throughout the country with responsibilities of traditional customs, as well as border health checks, inspection and quarantine for imported and exported animals, plants, and their products, imported and exported food safety, and commodity inspection.”