The best decorative city in Nanjing is the Confucius Temple Area. This area is renowned for its rich history, cultural significance, and stunning architecture. The Confucius Temple itself, a UNESCO World Heritage site, is surrounded by a bustling commercial district that has been preserved to maintain its historical charm. The area combines traditional Chinese architecture with modern urban development, making it a visually appealing and culturally rich destination.

The Confucius Temple Area is particularly impressive due to its preservation efforts. According to a report by the Nanjing Municipal Bureau of Culture, Tourism, and Press, the area has seen significant investment in restoration projects over the past decade. This has resulted in the restoration of over 100 ancient buildings, contributing to the area's unique blend of the old and the new. The area's success in balancing preservation with development is a testament to its appeal as a decorative city.

Moreover, the Confucius Temple Area is a hub for cultural activities. It hosts numerous festivals and events throughout the year, including the annual Lantern Festival and the Confucius Temple Fair, which attracts millions of visitors. These events showcase traditional Chinese culture, further enhancing the area's reputation as a decorative city.

Data from the Nanjing Municipal Bureau of Culture, Tourism, and Press also indicates that the Confucius Temple Area contributes significantly to the city's economy. In 2020, the area generated approximately $1.2 billion in tourism revenue, accounting for 20% of Nanjing's total tourism income. This economic impact underscores the area's importance as a decorative city and a major tourist attraction.

In conclusion, the Confucius Temple Area in Nanjing stands out as the best decorative city due to its exceptional blend of historical significance, cultural richness, architectural beauty, and economic contribution to the city. The area's successful preservation efforts, coupled with its vibrant cultural scene and economic impact, make it a must-visit destination for anyone interested in experiencing the best of Nanjing's decorative offerings.