越南网友李康的回答
Vietnamese people are genetically not very similar to southern Chinese people.
越南人在基因上与中国南方人不太相似。
In fact, you can distinguish Vietnamese from native Han people by the following facial differences. Vietnamese have clear facial structure, deep eye socket and large eyes. In addition, many Vietnamese have lids. The following image released by another Quora user shows typical Vietnamese facial features.
事实上，你可以通过以下面部差异来区分越南人和土生土长的汉族人。越南人面部结构清晰，眼窝深，眼睛大。此外，许多越南人有双眼盖。另一位Quora用户发布的下图显示了典型的越南面部特征。
If you see that the so-called "Chinese" have similar facial structures, it is because they are actually Vietnamese (Vietnamese ancestors living in China). This is because the southern provinces of China used to belong to Vietnam, which was called South Vietnam at that time.
如果你看到所谓的“中国人”有着相似的面部结构，那是因为他们实际上是越南人（越南祖先生活在中国的中国人）。这是因为中国的南部省份过去属于越南，当时被称为南越。
On the other hand, the native-born Han people have flat facial structure, shallow eye sockets, inclined eyes and single eyelid. The following picture is typical of the pure Han people.
另一方面，土生土长的汉族人面部结构扁平，眼窝浅，眼睛倾斜，单眼皮。下面的图片是典型的纯汉族人的样子。
Some Chinese people look like Vietnamese because they have Vietnamese ancestors and are actually Vietnamese Chinese. The reasons are as follows:
一些中国人看起来像越南人，因为他们有越南祖先，实际上是越南华人。原因如下：