I am sorry i cant type in Chinese. I think there might be some rogue app behind this or the DOZE mode is not being entered. I agree HTC has not optimized it to the best available battery life. But on an average i get a SOT of 5h30m to 6h. are you getting the same time?? try installing app like GREENIFY and see if any rogue app is running in the background. I find the CAMERA app running almost all the time..