decode video on Instagram: "- The X post by @Decode.video showcases the tidal bore of the Qiantang River, a natural phenomenon where the incoming tide forms a wave that travels up the river, creating a striking visual of a boat navigating through what appears to be sand-like waves but is actually water with sediment. - The Qiantang River's tidal bore is renowned as the world's largest, with waves reaching up to 9 meters (30 feet) in height and traveling at speeds up to 40 km/h (25 mph), a result