Study on the benefit compensation mechanism in the main grain producing areas 并列题名：Study on the benefit compensation mechanism in the main grain producing areas Benefit compensation mechanism of the major grain producing areas Study on compensation in major grain producing areas a study on the media communication mechanism in China's stock market Study on the issues of farmers' income in major grain producing areas Study on climate change and food security in the major grain producing areas in China Research on the compensation mechanism for the main function of grain production 并列题名：Study on the issues of farmers' income in major grain producing areas