 Chinatown peaked in the early 20th century in terms of population and activity, which was hampered by the 1901 Immigration Restriction Act and a general shift of businesses and residents from the Melbourne's central business district (CBD).The Dim Sim was invented in Chinatown, by William Wing Young, in 1945, at his restaurant "Wing Lee", and has become a major snack food in takeaway outlets and Chinese restaurants throughout the entire country.European residents of Melbourne and university students of the city began frequenting Chinatown eateries in the 1930s, leading to gradual mainstream Australian popularity which boomed in the 1960s–70s.