How about setting up a stall selling brine seafood?

Okay.

1. The market is wide. Many urban residents like brine seafood very much. The consumer market is wide, so it is very suitable to set up a stall to sell it.

2. The cost is low. To set up a stall to sell brine seafood, you only need to find a stall and then purchase and sell. No processing is required, the cost is low, and the profit is high.