1, Shouguang Expo 2003 is an agricultural exhibition, which aims to display local and national high-quality agricultural products, planting techniques and agricultural achievements and promote the development of agricultural industrialization. During the Expo, Huili County (now Shouguang City) once promoted and displayed tomato varieties and achieved good results. According to the reports at that time, the tomato varieties promoted at Shouguang Expo in 2003 included Dahongti, Pearl Red, Zhonghua You No.7 and so on. Among them, it is reported that "Dahongti" tomato has been welcomed by many audiences, which is characterized by large fruit, thick meat and rich juice, and is suitable for the production of fresh food and processed products. Therefore, the understanding of Shouguang Expo in 2003 was that Dahongti tomato was the best variety.

2. Shouguang City is located in the east of Shandong Province, China, and belongs to a county-level city under the jurisdiction of Weifang City.