Chinese tech companies are changing Mexico City

For Angel Xiao, a Chinese operations strategist who lives in Mexico City’s Nuevo Polanco neighborhood, it’s easy to satisfy her cravings for food that reminds her of home.

That’s because authentic Chinese food options in Nuevo Polanco, an upper-class cluster of corporate buildings, high-rise apartments, and luxury stores, are everywhere. She can grab a bowl of biang biang noodles — thick, hand-pulled noodles in a spicy, garlicky sauce — at Shaanxi Sabor, a two-floor noodle shop…