Why do Hongkongers care so much about Cantonese? (youtube.com)
A Chinese-owned variedades shop opened where I am, and I tried chatting to them in Spanish, and we exchanged a few pleasantries but when I asked them which language they spoke they didn't understand and said there was only one Chinese language, and I said aren't there two languages in China? but even after pressing a couple times, and mentioning Cantonese and Mandarin, they seemed to not know of more than one Chinese language.