I not yet try it so cannot tell you my opinion but I bought Rifle S4 before, very good bike . Liaoge only sells those bikes that value for money and good quality. You can go to his shop to test ride before you decide. Note: No perfect bike in this world, suit me might not suit you. Even Brompton also needs to be upgraded to suit the rider.
Would like to cycle with you so you are not so lonely. Work time unable to meet yours. But still enjoy your video and your spirit of exploring places. Stay safe and enjoy life.