Journalist David Eimer 's new book covers many of China 's five official ethnic groups . Xishuangbanna is China 's largest , with food and climate similar to Southeast Asian countries . Almost half of Chinese minorities live in the south of Yunnan . He also visited the ` ` third Korea , '' located inside of China . He says Koreans are the hardest to interview .
Journalist David Eimer 's new book covers many of China 's five official ethnic groups . Xishuangbanna is China 's largest , with food and climate similar to Southeast Asian countries . He also visited the ` ` third Korea , '' located inside of China . He says Koreans are the hardest to interview .