它们的代码中都有【Population="0"】，也就是说，官方是人为把它们要求的人口设置为0的——不是一边为1一边0的遗漏的情况
汉长城：
<Row ConstructibleType="IMPROVEMENT_HAN_GREAT_WALL" Name="LOC_IMPROVEMENT_HAN_GREAT_WALL_NAME" Description="LOC_IMPROVEMENT_HAN_GREAT_WALL_DESCRIPTION" Tooltip="LOC_IMPROVEMENT_HAN_GREAT_WALL_TOOLTIP" ConstructibleClass="IMPROVEMENT" Cost="60" Population="0" Age="AGE_ANTIQUITY"/>
明长城：
<Row ConstructibleType="IMPROVEMENT_MING_GREAT_WALL" Name="LOC_IMPROVEMENT_MING_GREAT_WALL_NAME" Description="LOC_IMPROVEMENT_MING_GREAT_WALL_DESCRIPTION" Tooltip="LOC_IMPROVEMENT_MING_GREAT_WALL_TOOLTIP" ConstructibleClass="IMPROVEMENT" Cost="90" Population="0" Age="AGE_EXPLORATION"/>
汉长城：
<Row ConstructibleType="IMPROVEMENT_HAN_GREAT_WALL" Name="LOC_IMPROVEMENT_HAN_GREAT_WALL_NAME" Description="LOC_IMPROVEMENT_HAN_GREAT_WALL_DESCRIPTION" Tooltip="LOC_IMPROVEMENT_HAN_GREAT_WALL_TOOLTIP" ConstructibleClass="IMPROVEMENT" Cost="60" Population="0" Age="AGE_ANTIQUITY"/>
明长城：
<Row ConstructibleType="IMPROVEMENT_MING_GREAT_WALL" Name="LOC_IMPROVEMENT_MING_GREAT_WALL_NAME" Description="LOC_IMPROVEMENT_MING_GREAT_WALL_DESCRIPTION" Tooltip="LOC_IMPROVEMENT_MING_GREAT_WALL_TOOLTIP" ConstructibleClass="IMPROVEMENT" Cost="90" Population="0" Age="AGE_EXPLORATION"/>
