One of the merrymakings on the Lantern Festival is the custom of setting off firecrackers and fireworks. Every year, Yen Suei town in Tainan County would hold the crazy Fireworks Display to celebrate the Lantern Festival and give thanks to the Lord Guan (關公), who is believed to instructed the residents in Yen Suei town to set off firecrackers to drive out evil spirits and chasing away the terrible plague bursting about 120 years ago.