A wall built for protection or defense, typically between two opposing or warring sides; a defensive barrier. Also called a 隔离墙gélíqiáng.
battlement
A defensive wall or parapet built at the top of a fortification.
[purple vegetable diet]
(abbreviation) A nutritional concept in mainland China advocating the consumption of purple vegetables and fruits to boost the immune system; short for 紫色蔬菜健康防卫墙zǐsèshūcàijiànkāngfángwèiqiáng.