[1] Based on the latest survey data on nutrition and dietary intake of 6,600 cancer patients in 31 provinces, municipalities and autonomous regions across the country. 2The writing team is composed of more than ten well-known nutrition experts and oncology experts across the country. A team of authors ensuring the highest academic professional level in the country. Have strong social influence and appeal. 3Reflect the latest academic progress at home and abroad, and display richer and more powerful latest scientific research evidence. 4Provide comprehensive and targeted nutritional solutions from the aspects of "different treatment stages, different treatment methods, and different parts of tumors", which are easy to understand and have strong practicality and operability. 5Specially aims at common misunderstandings about tumor nutrition in society, providing scientific information and correcting misunderstandings. 6Sharing the nutritional support stories of some cancer patients will make them more approachable and friendly to the majority of cancer patients.