National Geographic is kicking China Revealed this week, a series that centers around two museum exhibitions which run from today through September 7, and a film program paired to each exhibit. Tonight, there’s a presentation to introduce the museum’s exhibit on the early 15th century Chinese explorer Zheng He; Friday at noon, the museum screens a documentary following National Geographic photographer Mike Yamashida as he retraces many of Zheng’s travels. And tomorrow, there’s a presentation…