Longcheng Park Greenway to Wedding Park. Longcheng Park Greenway to Wedding Park is about 14.8km long. Shenzhen Longcheng Park is a mountain green space in the central city of Longgang, with an area of about 1.89 square kilometers. The roads in the park are divided into two sections, namely, the ladder trail and the built greenway (including the fire escape), with a length of ***4. 1 km.