Welcome to the Forum.
Not sure I'd go after a Flying Pigeon, if it's the Chinese one I'm thinking of. Something like 1/3 of the world's bikes are made there, and for a long time, there were only 2-3 models. You can probably buy an old road bike and an old upright bike and combine them somewhat to make a flat bar roadie with a good seating position, clearance for bigger tires and fenders, and have a blast on it.