Inner Side Out | How did Inner Mongolia turn a polluted lake into a bird paradise?

Do you know why lakes are called "seas" in Mongolian?

Because on the grassland, every lake is as precious as the ocean.

Once a stinky, fading wetland in Inner Mongolia Autonomous Region, Ulan Suhai Lake is now a reborn paradise for over 260 bird species! The secret? Follow us to find out.■