Abstract: 'Heguang Simiao' is a new conventional rice variety with high harvest index and excellent comprehensive traits. It has a good plant type, high yield and good rice quality. When participating in the regional test of Guangdong Province and the national late indica rice area in the middle and lower reaches of the Yangtze River, the rice quality reached the first grade of high quality awarded by the Ministry and the first grade of high quality in the agricultural industry. The grains of rice are crystal clear and lustrous, the maximum yield per 667 m² of the regional trial reached 608.6 kg. It was approved by Guangdong Province in 2019, it was approved by the state twice successively in 2020 and 2023. Meanwhile, the variety is also an excellent hybrid rice restorer line. Seven hybrid rice combinations, including 'Quanyou Heguang Simiao' and 'Huiliangyou Guangsimiao', have been developed and approved based on it as the male parent. These combinations are characterized by high and stable yield, good quality and good adaptability, demonstrating the "core" role of 'Heguang Simiao' seedlings as superior parent. 'Heguang Simiao' seedlings can be promoted and cultivated in seven regions including Guangdong, Guangxi, Hainan, Fujian, Jiangxi, Hunan and Zhejiang. It was selected as a leading agricultural variety in Guangdong Province in 2024-2025, and is currently a key promoted variety in cities such as Huizhou, Zhongshan city and Haifeng County in Guangdong Province. It has a good prospect for promotion and application in the double-cropping rice areas of South China and the late indica rice areas in the middle and lower reaches of the Yangtze River.