In early spring 2023, with the end of Covid-19 in China, MK helped produce this album for Rubey. Focusing on the piano atmosphere and framework of the Night Piano Project, MK added some flowing sounds and textures to Rubey's original tracks using a guitar, delay effects, and a synthesizer. At the same time, Ding Mao, another member of the band Hualun, contributed on two tracks. Of course, all production processes were completed at night; capturing the quiet atmosphere of traditional Eastern natural landscapes and transforming them with indoor amorous feelings. These melodies and notes wander and travel through different times and spaces, and ultimately converge in different rooms.

"In Different Rooms" is the second solo album by Rubey, a keyboardist from the band Hualun. It is also Rubey's second album release since producing the soundtrack for the movie "Virgin Blue" in 2022. It includes 8 works created between 2020 and 2023. Rubey and MK are located in Beijing and Shenzhen respectively. Just like many of Hualun's works, the original idea for "In Different Rooms" came from Rubey's daily piano improvisation practice. Named the "Night Piano Project", Rubey would spend his nights playing his Yamaha electric piano.