A folk custom

JIAO　BEI

In parts of East Asia, people have long used a pair of crescent wooden blocks—jiaobei—when they wanted a simple yes-or-no pause. You name one matter. You let the pair fall. The convex face is yin, the flat face is yang. One of each is the balanced throw. cup.eroocs.com is a browser version of that custom, for entertainment and cultural experience only. It is not advice.