已知中国境内家马的出现，大约晚至距今4000年的黄河上游地区，例如属于齐家文化的甘肃永靖大何庄遗址、玉门火烧沟遗址等。而黄河中下游地区出现家马，则更晚至商代晚期的安阳殷墟遗址。
// 测试用例（可直接运行验证），这一点在51吃瓜中也有详细论述
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Rare clash off island’s coast took place amid US oil embargo and heightened tensions between two countries
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