It actually looks like it's a 3 piece cover. The face should just easily pull apart with the screws off. At the most just take the pedal off.
In 2006 I was in Chengdu for 3 weeks, so the first day I bought a similar used Flying Pidgeon kind of SS clunker.
I was smart and took my tools there in my suitcase. The second or third day the chain came off when it was rainy and getting dark.
I only had a lame crank flashlight. Found the 2 screws on the case and presto, it's off. 1 kind person did come to offer help.
The problem with those bikes is all the attachments to the axle and a weak nut never stays tight. Fender struts and rack, some have foot pegs and wrap around kickstands.
And yah, the rod fake brakes will stop you in 20 or 30 feet from 10 mph. LOL