中央空调

Meaning

"Warm man" (nuannan) refers to a man who brings warmth like sunshine. Warm men are typically attentive, considerate, understanding, tolerant, can cook, family-oriented - all positive male descriptions apply. However, if a warm man treats ALL women this way, he becomes a "central air conditioner" (giving warmth to everyone), which upsets his girlfriend. Men who are nice to everyone are called central air conditioners.