This collection is a grand picture of gusu, made for xu Yang. The entire picture ingenious layout rigorous, imposing manner, stroke meticulous, very delicate to depict the jiangnan of lakes and mountains, rural cottage, Chang professional wall, ancient crossing the line of the boat, along the river town, flowing water others, folk customs, yamun business boss, depicts the landscape of suzhou suburban thyme and the bustling scene street, vividly reflect the beautiful scenery and rich natural resources, the middle of the 18th century suzhou, all sectors thriving and prosperous scene of overflowing humanism, has the very high art appreciation value, known by later generations as the research of the qing dynasty, the encyclopedia of suzhou. Full picture with various characters of more than 12000 people, all kinds of building about 2140 buildings, all kinds of more than 50 Bridges, a variety of passenger and cargo ships of more than 400 only, all kinds of business signs of more than 200 blocks, 6.9 meters long, 3.85 cm wide, fully shows the ancient city of suzhou grand street style, is the study of 250 years ago "qianlong time" image data, is of great historical value.