Context: In the past 20 years, several commercial streets have been developed, hence the nightlife has become more diverse: there are shopping malls opening late in the Xinjiekou CBD and Hunan Road. The well-established "Nanjing 1912" district hosts a wide variety of recreational facilities ranging from traditional restaurants and western pubs to dance clubs. There are two major areas where bars are densely located; one is in 1912 block; the other is along Shanghai road and its neighbourhood. Both are popular with international residents of the city.

Question: When did more commercial streets become built in Nanjing?
Answer: In the past 20 years

Question: What has happened as the result of more commercial streets in Nanjing?
Answer: the nightlife has become more diverse

Question: What area has lots of types of recreational outlets?
Answer: "Nanjing 1912"

Question: Other than at "Nanjing 1912", where else are there a lot of bars?
Answer: along Shanghai road and its neighbourhood

Question: The two areas with a lot of bars are popular with whom?
Answer: international residents of the city