I can easily lift my bike over the metro ticket booth. Also, there is plenty of space as there are very few riders current. I've seen trolleys with cargo enter the subway, but never a full bike.
Are bikes not allowed as cargo, or maybe I can just take the front wheel off and it's legal subway carriage cargo?
My plan is not to ship the bike as airport cargo, but to use that subway line to get me to the airport and then ride off to Songming from the airport. I don't have a bike bag, not that I would want to use one, cause then I have to leave the bag somewhere.