Turning a $5,000 donation into 50,000 trees to hold back the desert was a promise made between two strangers – one in the US, the other in China. Twenty-seven years later, with that promise kept, Ronald Sakolsky has finally met Yin Yuzhen in person. 

He opens up about the reunion to CGTN's Tian Wei, and what it feels like to finally hold Yin's hand, hug her and cry with her. "When you can touch your dream, it becomes a reality."