For central heat, China has a north-south divide at Qin-Huai line - Los Angeles Times

Growing up in Mao Tse-tung's hometown of Shaoshan in southern China, Tan Huiyan remembers the wintertime sensation of stepping inside through her front door — and into the cold.
When it comes to government-provided central heating, China is a land of haves and have-nots.

Qinling–Huaihe Line - Wikiwand

Yangtze - Wikipedia

PDF) Physical Geography of China and the U.S.

Invisible lines: a divided world - Geographical

How did China become enormous? - Quora

Is Jiangsu North or South China? - Quora

Building China: Why Does Half of China Struggle to Stay Warm Indoors i

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How will China look if it splits into smaller countries? - Quora

How do Southern and Northern Chinese people differ? - Quora

PDF) New Evidence on the Impact of Sustained Exposure to Air Pollution on Life Expectancy from China's Huai

Analysis of thermal comfort experience using peak-end rule with air conditioner in heating season - ScienceDirect

How will China look if it splits into smaller countries? - Quora