城市绿地系统有机更新“四化”法研究

It's a universal and urgent task to reform and renew, optimize and improve the existing urban green space systems in the new round of urban green space system construction for many cities. Taking Wu' an City, Hebei Province, as an example, the paper put forward a method of four transformations, namely, transforming the isolated into systematic, transforming the simple into the diversified, transforming the plain into the featured, transforming the backward into the advanced, and explored how to achieve this goal.