The reason Wang Wenwen went to Cambodia was to complete the review of a loan. During her stay in Cambodia, she needed to work with local people to inspect the documents required for review. This may be a business assignment involving a loan or investment decision, or it may be to conduct charitable work or support local economic development. Regardless of the specific reason, Wang Wenwen's work in Cambodia may be to promote local and international economic cooperation and to contribute to the growth and development of individuals or organizations.