This is obviously the big fish eat small fish. Judging from your description, there is no possibility of returning your share capital, just pay the tuition! You didn't sign any contract when you bought shares to open a shop. Do you think small stocks get extra points? Dream on. Whether you make a profit or lose money, you won't get a bonus, and you will eat your share capital. Because: first, there is no contract constraint to defend rights. Second, you can't know whether you are earning or losing. Third, because of one or two points, they said they would lose money. Of course, they said they would lose money no matter how much they earned. They will eat your money anyway. What can you do? You work in a shop without pay. They will not only eat your share capital, but also eat your labor. What can you do?
Get out of here, lest you become Yang Bailao, the father of the white-haired girl, and find another place to work and earn some salary.
We should also learn some lessons after paying tuition. (1) a partnership must have a contract to do things, and every clause of the contract should be carefully studied to see if there are any loopholes. 2 Investment must assess risks.