Kongming Lantern, also called Sky Lantern, is said to have been invented by Zhu Gekongming (Zhuge Liang) during the Three Kingdoms period. At that time, Zhu Gekongming was besieged by Sima Yi in Yuping, unable to send troops out of the city for help. Kong Ming calculated the wind direction, made a floating paper lantern, tied with the message for help, and then escaped as expected, so later generations called this lantern Kong Ming Lantern. Another way of saying this is that this lantern looks like a hat worn by Zhu Gekongming, hence its name.
Modern people put lanterns on Kongming lanterns as a blessing. The wishes of men, women and children to write blessings by hand symbolize the bumper harvest and happiness every year.