After the return of Hong Kong and Macao, the use of English and Portuguese continued, mainly because the historical, cultural and economic background of these two regions determined that English and Portuguese played an important role in these regions. Hong Kong was colonized by Britain for 155 years. The use of English has been deeply rooted in people's hearts and has become one of the mainstays of Hong Kong society. Macao was colonized by Portugal for 443 years, and Portuguese became one of the official languages of Macao. After the reunification, both Hong Kong and Macao kept their own policies and symbols, and respected local culture and historical traditions. At the same time, English and Portuguese are still international and still play an important role in business, education, science and technology, so their use continues to be recognized and supported.