Why close pairing is difficult for wild walnuts

This is an English reading overview of the Chinese article, rather than a complete translation. The Chinese source has been updated since this overview was prepared; consult the original for the latest details.

The central idea

Natural variation and a less uniform supply make extremely close pairs harder to assemble. That does not mean pairing is unimportant. The brand’s order is to establish a sound foundation first, then seek harmony between two suitable walnuts rather than sacrifice quality for perfect similarity.