Who are the upstream customers of the hotel?

Vanke, China Resources, R&F, etc. Upstream customers refer to industries that provide venues and raw materials for companies. Vanke, China Resources and R&F are all operating companies that provide hotel raw materials, so they are all upstream customers of the hotel. Upstream customers correspond to downstream customers. Downstream customers refer to primary agents, secondary agents, distributors and self-employed, and the terminals are customers.