Whether or not you can fish at 浪水湾 (Làng shuǐ wān) in 飞龙湖 (Fēi lóng hú) depends on the current regulations and restrictions.
However, based on general information about 风景区的漾水湾 (Fēng jǐng qū de làng shuǐ wān), it is a popular spot for fishing and often hosts fishing tournaments. The lake is said to have an abundance of fish species such as large-mouth bass, mandarin fish, and sturgeon.
Before attempting to fish there, I would recommend checking with local authorities or the park administrators to see if any permits are required and what specific regulations are in place regarding things like equipment, catch limits, and protected areas.