Analysis of information sources in references of the Wikipedia article "Prostitution in Portugal" in English language version.
Triads in Portugal. Sources in Lisbon say that Chinese triad gangs from the Portuguese colony of Macau are setting up in Portugal ahead of the handover of Macau to China in 1999. Security sources fear that as many as 1000 triad members could settle in Portugal. They are already involved in securing Portuguese citizenship for Macau residents by arranging marriages of convenience with Portuguese prostitutes.
By 1845, the total number of prostitutes increased, to 123. Most were Chinese, with a minority of them being Portuguese (the Portuguese colony of Macao was near), or other nationalities. At those times, prostitutes concentrated in the
The Central was Macao's glittering gambling casino, packed every night with Portuguese prostitutes, high rollers from Hong Kong, and hundreds of Chinese playing fan tan, their favorite card game.