The first chapter of the Oh Sib Young(五十營) explains that the length of the measurement of channels(脈度) is sixteen zahngs two cheocks(16丈2尺). The second chapter says that nourishing gi(營氣) circles around(周行) the whole body 50 times during 13,500 times of breathing in twenty-four hours. The third chapter explains that the total length reaches 810 zhangs(810丈) if it circles around 50 times. Through construction of word, comparison of annotation, investigation, literal translation, free translation, conclusion analysis of these ancient writings, the following results were obtained. In the second chapter, "twenty five bun(二十五分)" should be modified into "twenty bun one Ii six ho(二十分一釐六毫) " or "twenty bun and the rest(二十分有奇)", "forty bun(四十分)" should be changed into "forty bun sam Ii two ho(四十分三釐二毫)" or "forty bun and the rest", and "five su twenty bun(五宿二十分)" should be modified into "five su twenty one bun six li(五宿二十分六釐)" or "two hundred ten bun and the rest(二百十分有奇)" in order to clarify their meanings.