For example, AWS China and Azure Operated by 21Vianet (official name of Azure China) are operated independently by Chinese companies, and have incomplete integrations with the rest of their services, because of how hard Chinese govt compliance is. And GCP only has a location in Hong Kong, which means Chinese users can mostly access it but it's unreliable https://gitlab.com/gitlab-com/migration/issues/649
This gives Alibaba a huge advantage domestically.