The first element was uncovered based on the widespread suspicion of the way "harmony" was displayed. Several times during the performances, the character 和 appeared without its usual accompanying 谐. The only explanation was that this was intentional. On the other hand, though the word 和 is normally pronounced as "he," when playing mahjong it appears on a tile and is read as "Hu" - 胡.
Then came the picture of a silk weaver, followed by scenes of the
Next, ocean waves carried many boats, and formations showed Zheng He leading a team of voyagers into the Pacific. What is the Chinese character for "waves"? 涛 - tao.
Do you see the code now?
I am truly fond of the street wisdom of Beijingers and their fun-seeking nature. No doubt more messages will be unraveled in the months to come. :-)