la mandarina 用英语:

I prefer tangerines to oranges, they're sweeter. I'll buy two kilograms of tangerines.

I cannot speak Mandarin well.

This isn't Mandarin, it's Shanghainese.

Even people with perfect pitch sometimes have a hard time with Mandarin, let alone Cantonese.

Beijingers speak Mandarin with a roll in the tongue that no Southerner could ever utter.

Shanghainese is actually a kind of pidgin, based on Wu dialects, Lower Yangtze Mandarin, and English loanwords.