So for the symbolism that individuals can stand and be problematic (like holding up police vans, or cycling in the middle or busy main road)

I don't claim the politics that much that the physical presence or mental perseverance - it does matter.

Some comments I got from another page:

- One of the most iconic image of the century! That man standing in front of a Military Tank! What bravery, what defiance! Truly inspirational

He was stopping the tanks leaving the square.
Ironic much?

You know what? This shows more the restraint of the army than the heroism of the individual.

His name was Wang Weilin (王维林). Never forget it

historical momentous scene of 20th century that inspired millions to resist
more comments here:
https://nitter.snopyta.org/carlzha/status/1134582926325104641