You will read the scene it happens in, learn 10 words and phrases, take apart the pattern behind them (太~了 intensifier + social vocabulary), hear them in a conversation, rehearse them, and finish by saying one thing out loud to be graded.
A rooftop bar on the Bund looking at the Pudong skyline, or a hot pot dinner with new friends. The social Mandarin that makes people feel you're genuinely present.
The Bund at 10pm: the neo-classical European buildings lit in gold on the west bank, the science-fiction Pudong skyline across the Huangpu River, the Shanghai Tower's LED helix climbing 632 meters, the Oriental Pearl Tower glowing pink. It is, genuinely, one of the most spectacular urban views on earth.
The stranger is on a rooftop bar with his new Shanghai colleague. Drinks have arrived. She raises her glass. 「干杯！欢迎来上海！」 Welcome to Shanghai. They drink.
「上海太漂亮了！」 the stranger says. He means it completely. 「对吧！」 she laughs. 「我爱上海！」
「加你微信吧！交个朋友！」 He opens WeChat. They scan each other's QR codes. Two seconds. Done. This is how Shanghai friendships begin — not with a business card, but with a scan.
「以后还会来！」 — 「随时欢迎！」 Always welcome. The skyline agrees.