Lovely sketches from an unknown protest artist

I discovered this lovely sketches while strolling through the crowd at Admiralty, which is still the center of the civil uprising here in Hong Kong. They were photocopied multiple times and stuck against lanterns and walls. I do not know who drew them. They are only a tiny bit of all the creativity that the mass gatherings on the street had sparked.

Do you know the artist? I would love to meet him!