The community in Shunyi that offers a high cost-performance ratio is Yizhuang. Yizhuang is known for its affordable housing options with access to quality amenities and transportation. This area has seen significant development in recent years, making it an attractive choice for those seeking value for their money.

The high cost-performance ratio in Yizhuang can be attributed to several factors. Firstly, the housing prices in Yizhuang are generally lower compared to other upscale communities in Shunyi. According to data from the Beijing Real Estate Association, the average price per square meter in Yizhuang is around 50,000 RMB, which is approximately 20% lower than the average price in Shunyi's central districts. This affordability is particularly appealing to young professionals and families looking for a balance between quality living and budget constraints.

Secondly, Yizhuang boasts a range of amenities that cater to the needs of residents. The community features numerous parks, shopping centers, and entertainment facilities, making it a convenient place to live. For instance, the Yizhuang Cultural and Creative Industry Park offers a vibrant atmosphere with art galleries, theaters, and dining options. Additionally, the Yizhuang International Airport is just a short distance away, providing easy access to domestic and international destinations.

Moreover, Yizhuang's transportation infrastructure is well-developed. The community is served by the Yizhuang Line of the Beijing Subway, which connects it to the city center and other key areas. This convenient access to public transportation not only saves residents time and money but also reduces the need for personal vehicles, contributing to a more sustainable living environment.

Furthermore, Yizhuang has seen a surge in the development of educational institutions. The presence of several renowned schools and universities in the area ensures that families have access to quality education for their children. This aspect adds to the overall attractiveness of the community and justifies the high cost-performance ratio.

In conclusion, Yizhuang in Shunyi stands out as a community that offers a high cost-performance ratio. Its affordable housing prices, coupled with access to quality amenities, transportation, and educational institutions, make it an ideal choice for those seeking value for their money.