Normally, in the US and I assume in other countries which drive on the right side of the road, the left arm is used for hand turn-signals. Since bike braking is more stable when just the rear brake is applied than when just the front brake is applied, the US regulations and practicality require that the right brake lever controls the rear brake so the left hand is free to signal. For some reason that I can't understand, the FreeRide bike from mainland China comes set up with the right brake lever controlling the front brake. I don't understand this because China (other than Hong Kong and Macau) drives on the right, and the big market for this bike is mainland China.
So, I set out to swap the brake levers to the US standard. I'm writing this to explain how I got around the problems encountered in what seemed to be a simple operation. First, getting the grips off was difficult. They wouldn't budge. What worked was that I first warmed the grip with a hot-air gun (like a hair dryer) to give it more stretch ability, then I worked a thin screwdriver under the edge for about 1" and sprayed into the gap some Windex window cleaner (which is alcohol, water, and detergent, mainly). Then I was able to gradually work the screwdriver around the circumference of the bar under the grip, squirted a little more Windex in, and got the grip to turn on the bar. Then it was easy to slide it off. Getting the brake levers to budge was difficult after loosening the set screw, so I had to use a flat blade screwdriver to slightly pry the brake lever clamp open enough to move it. More Windex on the bar helped lubricate. The Windex was my choice because when you wipe it off it leaves no residue.