How many kilometers has the road from Hua 'an high-speed railway to Gao 'an been widened?

0.3 kilometers. Gaoche Township, belonging to Hua 'an County, Zhangzhou City, Fujian Province, widened the highway from Gaoche to Gao 'an by 0.3 km. Gaoche Township is located in the southwest of Hua 'an County, along the middle reaches of Jiangbei Creek in Kowloon, bordering Xinping Town and Jinshan Forest Farm in the east and northeast, Shajian Town in the south, Gao 'an Town and Makeng Township in the west and northwest, and Huafeng Town in the north.