Did the swallow fly back from the south on July 9?

Swallows fly back to the north from the south around April.

"/kloc-No shooting in 0/929, walking on the ice in 3949, watching the willows along the river in 5969, opening the river in 79, swallowing it in 89, and plowing cattle everywhere." .

This means that because the earth has accumulated cold and hot energy some time ago, there will be 40 days of coldest weather from winter to the future; 18 solstice after beginning of winter, stiff hands and feet; The period from 18 days after beginning of winter to 36 days 18 days is the coldest period in a year, with the river surface frozen and the river blocked. Once winter comes to 18 days from 36 days to 54 days in the future, willows along the river will sprout new buds and the climate will get warmer; From winter to the 54th day to the 63rd day, swallows fly back to the north from the south. 63-72 days after the winter solstice and beyond, we will prepare for spring ploughing, and the weather will be completely warm.