Do not sustain your breath at your maximum exhalation. Leave as much air as there remains during your regular exhaling, that is 10-15 percent of the lungs volume. At the last second quickly exhale this leftover.
不要过份呼气後闭气，跟平常呼气一样，肺里都留着大概10-15 \u0025的气。於最后一秒时赶快地把这剩下的气也呼出。