笑中有刀

Explanation: With "This idiom." Tang Bai "degree days" Poetry: the "invisible generation of the House of Li Yi Shin Shin laugh, smile and a knife to kill potential." "Old Tang Li Yi Chuan House": "House looks like temperature Christine Yi, Yi and human language will play a smile , while the narrow shade avoid thieves, both at the right to be, like people with himself, who intended to micro disobedient, Noir pour plus depression, so when you hide a knife in the meaning of the government laugh. "