[2] She then competed at the 2015 China National Youth Games in October, winning the floor title and medals on all events but vault, where she was fourth.

[3] Lu made her senior debut at the 2016 Chinese Championships and finished fourth on floor, missing the podium by two tenths.

[9] She had a stronger showing at the Chinese Individual Championships in September, winning bronzes in the all-around and on the floor, as well as placing fifth on uneven bars.

[12] She was named to the Chinese team for the 2019 Asian Championships in June, alongside Liu Jieyu, Yu Linmin, Zhao Shiting, and Zhou Ruiyu.

[16] Lu fell on a straddled Tkatchev release early in her routine during the uneven bars final and finish seventh.

[18] Lu finished her season at the Friendship and Solidarity Competition, which was held under strict COVID-19 safety protocols in Tokyo in November.

Lu rebounded on the second day of the event finals, winning silver on the balance beam behind Li Shijia and gold on the floor exercise.

"[21] In June, Lu won the bronze medal in the all-around at the 1st Chinese Olympic Trials behind Zhang Jin and Tang Xijing.

[23] On 3 July, Lu was selected to represent China at the 2020 Summer Olympics alongside Ou Yushan, Tang Xijing, and Zhang Jin.

Individually, she finished fourth in the all-around and seventh on the balance beam and won the silver medal on the uneven bars behind Fan Yilin.