A Year of the Pig stamp for 2019, unveiled by China Post Monday, shows a happy pig family—with three piglets. To some, it is a sign that the two-child policy is on its way out.

A new "pig family" postal stamp has stoked debate about whether China may further loosen its family planning policy next year as couples delay parenthood and the world's most populous nation greys.

According to the Associated Press, China, in celebration of the Year of the Pig, has released a set of stamps that smell like sweet-and-sour pork when you scratch the front of them and taste like ...