On 12 June 2019, Wang was featured on the song "Rumble" from the album Diaspora by GoldLink. Then he collaborated with Qin Fen, and released the single "Another" on 19 June 2019. On 20 July, Fendi launched its first ever velvet collection called "Fendi X Jackson Wang Capsule Collection". The limited edition collection, for which Jackson designed clothes, shoes and accessories, sold out immediately after the launch. It was then released worldwide on 26 July.
On 12 September 2019, Wang held a listening session of his first album Mirrors for the press: the digital record, which expresses the emotions of the contemporary youth and incorporates elements of China's traditional culture, was produced in China, South Korea, and the United States. Wang supervised the whole process, from the initial creation to the packaging, and was personally involved in arrangements, lyrics writing, and music video shooting. The album's first single, "Bullet to the Heart", was released on 24 September with a music video directed by Daniel Cloud Campos, and tells the obstacles and hardships experienced in pursuing something. The album's second single was "Dway!", published on 22 October with its music video. In conjunction with the release of Mirrors on 25 October, the singer and artist Da Yan created an interactive video installation space titled Bullet to the Heart: 0328 at the LOVE LOVE LOVE Art of Love Exhibition at Shum Yip Upperhills Tower 1 in Shenzhen from 24 October to 3 November.
On 11 October 2019, leading up to the release of Mirrors, Wang was featured in three tracks from 88rising's album Head in the Clouds II: "Tequila Sunrise", "Walking", and "I Love You 3000 II". On 12 December 2019, he was featured on the song "Face Power" from the album Mr. Enjoy Da Money, a solo album by Higher Brothers' KnowKnow.
In August 2019, during the 2019–20 Hong Kong protests, Wang uploaded a photo of the Chinese flag and declared himself as "one of 1.4 billion guardians of the Chinese flag" on his official Weibo account. In a January 2020 interview with Forbes, Wang introduced himself as "Jackson Wang from China" and stated: "My goal is just to put my name out on the table just to let everybody to get to know me. I want to ... let people know that Chinese kids are working on good music too."