The mangrove forest chose the morning because my daughter was worried that she would not dare to see the fireflies at night. The travel agency had arranged for the noon tour guide to wait for us at the mangrove pier. The river was wide to narrow all the way. At low tide, I saw the staggered roots of the mangrove forest. Three or two cockroaches, many square heads and small cockroaches, Two highly poisonous golden ring snakes sleeping on trees indicate that Bintan's natural environment is still very original.