Huaiji County is located in the northwest of Guangdong Province, north of Zhaoqing City and upstream of Suijiang River. It is located in the uplift zone of western Guangdong, with basin area in the west, low and high hill area in the middle and south, and mountain area in the east, north and northwest. It belongs to subtropical monsoon climate, with long summer and short winter, abundant rainfall, and annual average temperature of 21.1 ℃. The total area is 3554.07 square kilometers. It has jurisdiction over 2 streets, 16 towns and 1 ethnic township. It is a pilot project of fiscal reform in counties directly under the jurisdiction of Guangdong Province. As of 0:00 on November 1, 2020, the permanent population of Huaiji County is 805177. According to the registered residence population statistics of the County Public Security Bureau, the registered residence population of Huaiji County by the end of 2020 is 1129488, including 595605 males and 533883 females.

Huaiji County was established in Yintun Township, Sihui County, Nanhai County in the 13th year of Yuanjia in the Southern Dynasty (436). The Song Dynasty formed the basic situation of today's Huaiji County. In the Yuan Dynasty, it was transferred to Hezhou, the Guangzhong Bookstore Province of Lishu. In the Ming Dynasty, it was transferred to Wuzhou Prefecture in Guangxi. It was transferred to Guangdong Province in March 1952 and under the jurisdiction of Zhaoqing City in 1988. On December 9, 2020, Huaiji County was rated as the "Civilized City at County Level in Guangdong Province" from 2018 to 2020. The specialties of Huaiji County include Gangping cut powder, Xingang black tea, Gansama bamboo shoots, Huaiji tea stem bamboo, Wenlang honey pomelo, Tanmai watermelon, Qiaotou stone goat, etc. The tourism resources include natural scenic spots of karst landform, relics of Shangailing Zen culture, original natural ecological forest of Dahudding Mountain, Lijiang bamboo rhyme, Wenchang Pavilion, hot water pit and Yueshan hot spring.

In 2020, Huaiji County will achieve a GDP of 24.691 billion yuan, up 2.8% year on year; The general public budget revenue, fixed asset investment and added value of agriculture, forestry, animal husbandry and fishery at the same level increased by 6.6%, 14.3% and 7.6% respectively year on year; The per capita disposable income of all residents increased by 6.7%.