The neighborhood in Huai'an with the highest housing prices is the Central Business District (CBD). This area has seen a surge in property values due to its strategic location, economic activities, and infrastructure development. According to the latest data from the Huai'an Real Estate Association, the average housing price in the CBD has reached approximately 10,000 yuan per square meter, which is significantly higher than the city's average of around 6,000 yuan per square meter.

The Central Business District's high housing prices can be attributed to several factors. Firstly, the CBD is the economic hub of Huai'an, attracting a large number of businesses and professionals. The presence of major corporations, government offices, and commercial establishments has created a high demand for residential properties in the area. Secondly, the government's investment in infrastructure, such as the construction of new roads, public transportation, and green spaces, has enhanced the overall appeal of the neighborhood. This has led to an increase in property values as more people seek to live close to their workplaces and amenities.

Moreover, the CBD boasts a variety of high-end residential complexes, which have been designed to cater to the needs of affluent residents. These complexes offer state-of-the-art facilities, such as gyms, swimming pools, and security systems, making them highly desirable. The limited supply of such properties has further driven up prices in the area.

Additionally, the CBD's proximity to key landmarks and cultural institutions, such as the Huai'an Museum and the Huai'an Grand Theater, has added to its allure. These attractions draw tourists and investors, contributing to the neighborhood's economic growth and, consequently, its housing prices.

In conclusion, the Central Business District in Huai'an is the neighborhood with the highest housing prices due to its strategic location, economic activities, infrastructure development, and the presence of high-end residential complexes. The data from the Huai'an Real Estate Association supports this trend, with the average housing price in the CBD being approximately 10,000 yuan per square meter, which is well above the city's average.