Also, these aren’t new. Vehicles similar to these (but more commonly with three wheels, one in front and two in the back, and no windshield) have been everywhere in China for decades and used for all kinds of purposes. My early childhood (before my family moved) was filled with these all over the city. They’re a pretty solid light cargo vehicle, but they’re unpowered and can get heavy, so you definitely need to put in the work to move them, especially up a hill. Though powered versions are becoming increasingly common in China and elsewhere, which AFAIK just use the same battery and drive system as an electric scooter or moped, which are also extremely common in China.