To seal off one's territory and strictly guard it; to adopt a closed-door policy for self-preservation or defense.
面对日益激烈的市场竞争，这家小店选择闭境自守，专注于提升服务质量和特色产品。
Faced with increasingly fierce market competition, this small shop chose to close itself off, focusing on improving service quality and unique products.
Next Idiom