zài / zhèng / shì / chǎng / hé / bù / yīng / gāi / suí / yì / yòng / lǎo / hēi / chēng / hū / bié / rén

在正式场合，不应该随意用“老黑”称呼别人。

In formal situations, you should not casually call someone “老黑,” a racial label.