长亭外古道边芳草天

Meaning

"But the reason behind it is heartwarming." A phrase always added after some news headlines, similar to clickbait. Later, netizens started adding this phrase to everything. Examples: "Zheng Shuang's surrogacy and abandonment of child, but the reason behind it is heartwarming." "Guo's gibbon cries three times, but the reason behind it is heartwarming." The response to this meme is often "global warming."