天行时气

Explanation: Line: Pop; time: season, climate; gas: pestilence, disease. Caused by abnormal weather epidemic. 　　Source: "Qian" Where the winter months, when suddenly a large heat; summer months, when suddenly a large cooler, are not affected by it, those who have suffered days of gas line, chosen by committing to this also. " 　　Examples: After another six months, suddenly and Liu sense ~, headache fever. (Ming-Hong Pian "Qing Ping Shan CONTRACT mind")