In the 1990s, nearly 90% of Kunming's wastewater was pumped untreated into Dianchi Lake.

20世纪90年代，昆明市近90%的废水都未经处理直接倒入滇池。

Authorities in Kunming have laid out a goal to improve the water rating on Dianchi Lake to grade four by 2020.

昆明市政府的目标是到2020年将滇池水质提高到4级。

We monitor the whole 2000 square kilometer area which Dianchi Lake water covers and control the water pollution considering the whole picture.

我们监测总面积达2000平方公里的滇池水域，从全局控制水污染状况。

In addition, government is now implementing its river chief system, meaning all 35 rivers that flow into Dianchi Lake are under more intense inspections.

除此之外，政府现在实行河长制，也就是说，汇入滇池的所有35条河流都处于严格监管之下。