All about parks

Everyone loves a park. It's an oasis to relax, recharge, and reconnect with nature. How can cities make them both accessible and sustainable? Beyond urban green spaces, China is also building a national park system to protect nature outside of cities. What makes national parks different from the parks in our neighborhoods? What does it take to protect nature on such a vast scale? On the show: Fei Fei, Yushan & Yushun