generally speaking, the following aspects should be considered in the determination of foreign investment of real estate enterprises:

investment background and purpose: to understand the specific background and purpose of real estate enterprises' investment in catering industry, including the process of investment decision-making, the amount and proportion of investment, the mode of investment cooperation, etc.

operating status and financial status: evaluate the operating status and financial status of catering enterprises, including operating income, cost, profit and other indicators, as well as the accuracy and reliability of financial statements.

Reasons for investment loss: Analyze the specific reasons for investment loss, including market environment, operation and management, capital flow and other issues.

degree and time of loss: evaluate the degree and time of investment loss, including the loss of principal, interest, income and the time span of loss.

other relevant factors: consider other factors that may affect the determination of investment losses, such as laws and regulations, contract terms and investment risks.

Based on the above factors, we can reasonably identify the losses of foreign investment in catering industry by real estate enterprises. If more specific assessment and identification are needed, it is recommended to consult a professional lawyer or accountant.