Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province. (Photos by Yang Junpeng/Xinhuanet)

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.

Aerial photo shows onion fields in Miandian Town of Jianshui County, Honghe Hani and Yi Autonomous Prefecture, southwest China's Yunnan Province.