When it comes to watchmaking, Logan Kuan Rao is motivated by a Chinese proverb that, loosely translated, says your character is shaped by your environment. And by another, much less philosophical phrase: Made in China. Both have been on his mind recently as Mr. Rao, an independent watchmaker based in China’s southern port city of Guangzhou, completed the first piece of his second design, called the Wuwei. It took time, but he has worked out how to use limited resources to make the watch, a 37.5-millimeter time-only mechanical piece, almost…