What is the relationship between Xinhui and Tianma?

Inclusion relation. According to the paper official website, Gastrodia elata is one of the core producing areas of Xinhui Chenpi. The core production area refers to a circle with a diameter of 2 kilometers around the Xiongzi Pagoda in Xinhui, including Tianma, Meijiang, Chakeng, Dongjia and Jia Xi. Xinhui contains Tianma, so Xinhui and Tianma are inclusive.