Is Changchun cold in late February and early March?

Not cold. Changchun, Jilin, just finished the Spring Festival in March. It's cold around the Spring Festival, but it will start to warm in March, so it's still not too cold. Changchun is located at 43 05' ~ 45' north latitude15' east longitude12418' ~127 05', the mid-latitude northern temperate zone in the northern hemisphere, and the northeast of China.