Experience in selling goods through supermarkets?

Hey there,
I have a startup in Taiwan dealing with the noodle market, with independent and website sales through multiple channels. The sales are relatively small for now but I have an opportunity to start working with a supermarket which would provide great exposure and hopefully catapult the brand and sales through the roof.

Does anyone have experience of selling through supermarkets and any success stories/nightmares to share?

Also, dealing with this is a new challenge and the investment needed to cover the costs and cash flow would be quite large. Does anyone have any experience in raising investment funds in Taiwan?

Thanks for your time in reading and any assistance is greatly appreciated.