People participate in Bakar Tongkang Festival or the barge burning tradition in Bagansiapi-Api, Riau, Indonesia, on June 30, 2018. (Xinhua/Afrianto S.)

People participate in Bakar Tongkang Festival or the barge burning tradition in Bagansiapi-Api, Riau, Indonesia, on June 30, 2018. (Xinhua/Afrianto S.)