nostr:npub1z06u9efgk7fa9z06gr602pp2xpn2w5dcyc2zdq9xsjaenxe69a3q3q7fpu
Probably because the context is literally foreign.
In Chinese it's used in words referencing foreign countries or big distances
https://en.m.wiktionary.org/wiki/%E5%A4%96
Kinda like saying a stock is going "to the moon" when a stock ticker doesn't have a distance. It's just a large rapidly rising number.