交界 jiāojiè common boundary
common boundary; common border
How to remember 交界: 交 hand over + 界 boundary = common boundary.
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How it is used
- Where two territories share a border - 两省交界 (liǎng shěng jiāojiè) the border between the two provinces, 交界处 (jiāojiè chù) the boundary point.
- Used of adjoining regions/areas meeting; more about the shared line than 边界 (biānjiè, a border/boundary line itself).
- Often as a verb: A与B交界 (A borders on B).