In most Southeast Asian countries, the members of the Chinese Diaspora have secured important position in the fields of administration, education and religion. Thanks to their capacity to work and to adapt as well as their frugality, their cultural influence continues to grow. Clans and factions form the essential structure of the ancient Chinese society. If Imperial China never developed a Civil Law, it's probably because the ancient Chinese society never really saw the need for it. This structure of relations could also explain why the Chinese civilisation didn't develop a real territorial reference. The Chinese Diaspora today covers different political and economical realities which could be conflicting. What primarily characterises the Diaspora is apparently its great capacity to organise itself in any economical, political, social or cultural environment. The capacity if its economic and administrative elites had been the determining factor of their development. However, the existence of informal and trans-national networks can also help the development of criminal activities. The presence of mafia groups and gangs of Chinese origin and their collusion with the world of finance and politics are historical facts in the region and could represent today a real threat for its stability. These criminal networks tend to forge business link with their Japanese, Russian, Korea, Italian or South American counterparts and sometimes could interfere with the process of political decision making.