the guest workers that arrived in East Germany came mainly from Communist countries allied with the Soviets and the SED used its guest worker programme to build international solidarity among fellow communist governments. The guest workers in East Germany came mainly from the Eastern Bloc, Hungary, Poland, Algeria, Vietnam, North Korea, Angola, Mozambique, and Cuba. Residency was typically limited to only three years. The conditions East German had to live in were much harsher than the living conditions of the in West Germany; accommodation was mainly in single-sex dormitories. In addition, contact between guest workers and East German citizens was extremely limited; were usually restricted to their dormitory or an area of the city which Germans were not allowed to enter — furthermore sexual relations with a German led to deportation. Female were not allowed to become pregnant during their stay. If they did, they were forced to have an abortion. Following the fall of the Berlin Wall in November 1989 and German reunification in 1990, the population of guest workers still remaining in the former East Germany faced deportation, premature discontinuation of residence and work permits as well as open discrimination in the workplace. Of the 100,000 guest workers remaining in East Germany after reunification, about 75% left because of the rising tide of xenophobia in former East German territories. Vietnamese were not considered legal immigrants and lived in "grey area". Many started selling goods at the roadside. Ten years after the fall of the Berlin wall most Vietnamese were granted the right to reside however and many started opening little shops. After the reunification, Germany offered the guest workers US$2,000 and a ticket home if they left. The country of Vietnam did not accept the ones back who refused to accept the money, Germany considered them "illegal immigrants" after 1994. In 1995, Germany paid $140 million to the Vietnamese government and made a contract about repatriation which stated that repatriation could be forced if necessary. By 2004, 11,000 former Vietnamese guest workers had been repatriated, 8,000 of them against their will. The children of the Vietnamese caused what has been called the "Vietnamese miracle". As shown by a study while in the Berlin districts of Lichtenberg and Marzahn, where those of Vietnamese descent account for only 2% of the general population, but make up 17% of the university preparatory school population of those districts. According to the headmaster