Baiyin sits in central Gansu and is served primarily by Mandarin Chinese (with Gansu-area Mandarin accents). English signage is limited, so a small set of ready phrases—greetings, directions, prices, and food terms—goes a long way in markets, restaurants, taxi ranks, and the Yellow River Stone Forest National Geopark area.
Most useful situations cluster around three moments: arriving and finding the train station or a taxi, ordering meals in a local noodle shop where pointing helps but speaking gets better service, and handling emergencies. Memorize tones for 'nǐ hǎo,' 'duōshǎo qián,' and 'bù yào là' first—they unlock roughly 60% of daily interactions.