A message from somebody:

"A parody of the current political situation, the bike parade serves as a manifold metaphor: the wheels of the bikes as the cliques to be stomped upon; the neverending pseudo-election as cyclical eternality like a bike running amok on the street.
Maybe a naughty degradation of the vehicles known as bicycles, it demonstrates the principled LSD’s never-boring methods of protest against the forgetful Hong Kong SAR government, with a cool display of many bikes on the street!"

However, I definitely disagree with him by saying bicycles is a degradation of the vehicles.