宝剑出鞘

中国，战国时期的青铜剑，在地下埋了2300多年，破土出鞘时寒光四射。
In China, a bronze sword from the Warring States Period was buried underground for more than 2,300 years. When it was unearthed and drawn out of its sheath, it emitted a cold and dazzling light.