For about a century, the coast of Taishan (台山, Táishān) in Guangdong's Wuyi (五邑, Wǔyì) counties was a shore people left. Emigrants sailed from its river ports to the Nanyang and North America, and the region earned the name it still carries: a qiaoxiang (侨乡, qiáoxiāng), an emigrant homeland. That shore now produces and ships.…