边界 (biān jiè): Boundary (Noun) — Meaning & Stroke Order

This is the border between two countries.

We need to clarify the boundaries between work and life.

He never believes there is a clear boundary between friendship and interests.

With technological development, the boundary between the real and virtual worlds is becoming blurred.

When discussing this issue, we must be careful not to cross the moral boundary.

We'd better set up a clear sign near the boundary of the residential area.