依然好有效 但係喺更多發展完善嘅市中心裡面 大量嘅網絡擴張幾乎係唔可能嘅 住房建築太密集 房地產太貴 同埋公共財政太脆弱
It still works, but in more well-developed city centers, massive network expansion is almost impossible, housing is too dense, real estate is too expensive, and public finances are too fragile