Random Internet pedantry/trivia: In the context of this comic, the apple or whatever it is doesn't need to be able to speak Mandarin to understand the orange because they live in a comic and everything they say is written. It only needs to be able to read either simplified or traditional Chinese.
The various dialects spoken throughout China are variously divergent, but the written language is by and large the same across the board. Denizens of different regions may pronounce what's written differently, or even very differently if you're in a Cantonese vs. Mandarin situation, but the underlying meaning behind the written words is still the same. This is as it was explained to me by my boss when I worked in a Chinese restaurant, anyhow.
As he tells it, when traveling even as a native "Chinese" speaker to remote corners of China (he primarily speaks Cantonese) you'll find that you and the locals are completely unintelligible to one another if you try to talk. Always carry a pen and paper with you; if you write down whatever you're trying to get across pretty much everyone can magically understand it.
...Also, based on what the orange is offering the apple might want to learn to read Chinese in a hurry.