"Blood is thicker than water" as they say, and another example is the return of former refugees is this welcome from communist Vietnam for the people they chased out to come home; all is forgiven.

With red flags and loud revolutionary music, the gathering inside the massive National Conference Hall in Hanoi's outskirts resembles a regular meeting of Vietnamese political cadres, only with better-cut suits and more fluent English.

This is the first meeting of Vietnam's diaspora to be held inside the country, attracting nearly 1,000 Vietnamese living overseas for a three-day conference. [Vietnam's diaspora urged to return home , November 27, 2009 ]

The term "diaspora" implies "Once a Vietnamese (or whatever), always a Vietnamese (or whatever)."

Another delegate, Nguyen Ngoc My, is equally excited about the changes in Vietnam.

Mr My served in South Vietnam's navy during the war. After the North Vietnamese took over in 1975 he was put in a re-education camp for more than two years until he fled to Australia by boat in 1978.

"I used to take part in anti-Hanoi protests whenever Vietnamese government officials visited Australia, up until 1986-1987, when Vietnam began the reform process."

In 1992, Mr My started making made regular visits back and since 2000 he has spent most of his time in Vietnam pursuing a number of investment projects. He eventually become chairman of the Overseas Vietnamese (or Viet kieu) Business Club in Ho Chi Minh City.

But he admits that there are still parts of the Vietnamese diaspora who remain suspicious of the country's Communist rulers.

Certainly some diasporans genuinely believe that a less repressive regime is in the offing. However, the experience of Red China shows that the tyrannical state structure remains in place. Anyway, it's all about the money.

There are nearly four million Vietnamese living overseas, mostly in the United States.

Each year, they send relatives back home up to $10bn, a major source of hard currency in the communist country.

But knowledge and expertise, not money, are what the government expects most from the Viet kieu.

For the Chinese version of tribe ??ber alles see Temps Decamp to Glorious PRC Homeland.