Step into Yangzhou's Chaoguan Customs House and be transported to the Ming-Qing dynasty's bustling trade hub! As one of China's most vital tax collection points, its blue-brick architecture still exudes historic charm. Stroll along cobblestone paths where salt merchants once thronged, and weathered walls whisper tales of the Grand Canal's glory days. Don't miss touching the centuries-old mooring stones - silent witnesses to Yangzhou's golden era as the 'First Metropolis of the Southeast'!