Supported by veteran Chinese singer Lao Lang (whose real name is Wang Yang) and producer Wang Di, the compilation was recorded at Baihua Studio, one of the oldest recording studios in the city. The studio gave birth to classic Chinese rock albums during the 1980s and '90s by established bands, such as Tang Dynasty and Black Panther.

The last band finished recording in late November, while in mid-December, the documentary team started recording live performances and audiences at the venue.

Zhao Qiyang, a music fan and a regular visitor to the venue, first went to School when he was just 8 years old. His father, a die-hard rock music fan, took his son there almost every weekend.

"Back then, I enjoyed the atmosphere there although I didn't understand the music. Now, I am 18. I still like going to School with my father. We have lots of fun together," says Zhao, who is a freshman of Capital Normal University, majoring in mathematics.

Liu launched School because "we wanted to have a place to enjoy music and drink together". Not in his wildest dreams did he expect School to last 10 years.

School opened on April 24, 2010, the last Saturday of the month. The stage was about eight meters wide and the venue was packed with people letting their hair down. The dancing, to put it mildly, was energetic.

Since then, Liu got married and became a father. "I met my wife at School, which made the place more meaningful to me personally," he adds.

School is known for offering fledgling Chinese indie bands opportunities. Among the bands that performed there and went onto greater things is Penicillin, an indie rock group whose members are all under 30 years old. They started playing in front of fewer than 10 people and now they have a stable fan base with about 100,000 followers on their Sina Weibo account.

Since 2013, bands formed by students at universities have been able to perform at School every Thursday.

In 2017 and 2018, School released two compilation albums with songs performed by those campus bands.

Among the school bands is an indie rock band, LaiSee, featuring four members, including lead vocalist Xiao Tian and guitarist Bai Shi. Founded in 2013, it first performed at School in 2014. The band has evolved and gained a large fan base. Two of their songs, D.O.G and The End of Summer, have been recorded in School's latest compilation.

"All of the four members have their own jobs, besides playing in the band. We play music for fun together," says the lead vocalist.

"Because of the COVID-19 outbreak, we have stopped performing for four months and we really miss the live shows at School."