First from how you use the words negroid and mongloid, I assume you have the concept of negroid-mongloid-caucasan-indian. I am opposed to this. This is an oversimplication but I am not going to detail about this.
"I saw some Mongolians dissimilar to Chinese, even to Northern ones. Also, What do you mean by "IndoCina"? Vietnamese people? My message 11-18-04 indicates my wrong thought about IndoCina. I thought
"Indocina" is white, fair but actually I saw wrong people.
How could you determine which was the "national" tribe, if there lives some tribes whose population is more than 10% of total population?"
Northen Chinese look more like Mongolian than the southern Chinese. Mongolian and northern Chinese can be obviously dissimilar but comparatively more similar than mongolian-southern chinese. Ya, I equate vietnamese to Indocina. Bar the minority, vietnamese look very alike to Cantonese and hokkien. I got the image of Vietnames from media and my own vietnamese friends. How do you define mongloid then?
And I did mixed up the words east n west. Sorry.
Can you spot Indian gene easily? Are you refereing to Aryan Indian (Hindi, north)or Dravidian (Tamil, Malayalam etc south) Indians? Aryan Indian can look like Aryan europeans (eg German) while Dravidians are quite distinct from other races. And can you spot Arabic gene easily? World footballer Zidane could be considered as Arabic, but can you spot his Arabic gene? Before I came to know some "pure" Arabics, I used to think that Zidane look very european.
Melayu has never been a tribe before, at least for written history. If you define Melayu = +-(mongloid + negroid) / 2, then the arguement of look of Melayu doesn't mean anything anymore because you construct the question according to your answer. With this definition, iban is melayu, orang asli are melayu, siamese are melayu, etc etc.
As you said, the word Melayu itself is quite ambiguos. But the word Melayu were first used to describe to Melaka people who came from Jambi. Normally a term is used to describe a collective stuff whose majority share the same characteristic, eg Chinese, japanese, hokkien etc. If you include Bugis, Java, Phillipino into Malay family, then you could say Malay = +- (mongloid + negroid)/2.
If you mean the Malay in Malaysia, then I have to say that the Malays in Malaysia are no longer pure jambi descendant. Substantial amount of foreigners (chinese, arabs, dravidian indians, thais, indonesians, indigenous) have mixed with pure Jambi descendant. The current Malays sometimes look similar to me, sometimes similar to my malayalam friends, sometimes to my Arabic friends. So the Malay look like Malay because they somehow look like everyone else.
Hope you don't mind my unscientific descriptions.
And sorry to other readers of this thread, this is a bit too much off topic already

Eng Wai
[%sig%]