《明史·志·卷七》
从冬至算起，经过九十一日三十一刻六分，纔到达春分，这是受太阳运行度数的限制，而在周天的度数，已超过二度多了。
自冬至起算，越九十一日三十一刻六分，而始历春分者，日为之限敢，乃在天则已逾二度余矣。
Counting from the winter solstice, it takes ninety-one days, thirty-one minutes, and six seconds to reach the spring equinox, which is limited by the number of degrees the sun moves, but in the number of degrees in a week, it has already exceeded two degrees.