招财进宝 (Zhāo Cái Jìn Bǎo) is a traditional Chinese saying. It means something like “May you become rich and lucky!”. It is often used during Chinese New Year to wish people good luck and wealth. So the label is not really advertising the bananas, but wishing the buyer good luck and lots of money!

I find that quite funny. While European banana labels promise “Premium Quality” or “Fresh Bananas”, Chinese labels simply wish you a lot of money!