Under Chinese donation, Pakistan has successfully established cold-chain vaccine storage and transportation equipment system. China has also delivered the emergency relief supplies to Pakistan. In 2020, it has provided 7 batches of anti-epidemic materials to deal with the outbreak of COVID-19. Last year, China has gifted over 2 million doses of Chinese vaccine to Pakistan.
Source
http://cpec.gov.pk/social-sector-development-projects
https://www.thenews.com.pk/print/762456-chinese-envoy-terms-cpec-important-pilot-project-of-bri