九九八十一 (Jiǔjiǔbāshíyī)

Background
"Jiǔjiǔbāshíyī" is an original song featuring Yuezheng Ling, with Luo Tianyi singing the harmonies. It was showcased at the 2016 bilibili New Year Gala and was officially uploaded to bilibili and YouTube on February 22, 2016 with improved mixing and PV. Certain parts of the song uses a melody from 权御天下 (Quán Yù Tiānxià) as a reference.

The song is titled after the 81 obstacles that Sun Wukong (The Monkey King) and his allies face during their journey to the west. The song is based on the epic itself.

In the PV, Ling is cast as Sun Wukong, while other voice synthesis characters and the staff of the song were cast as his allies or enemies. For the allies: Luo Tianyi is Zhu Bajie (Pigsy), Xin Hua is Sha Wujing (Sandy), YANHE is Xuanzang, and Yuezheng Longya is the dragon prince disguised as Xuanzang's horse. Other VOCALOIDs and related characters that appear are: KAITO, Hatsune Miku, Kagamine Len, Camui Gackpo, Megurine Luka, GUMI, Nekomura Iroha, VY2 (Roro), SeeU, OLIVER, IA, Zhanyin Lorra, Ling Caiyin, Zhiyu Moke, Sato Sasara, and.

This song has exceeded 100,000 views on bilibili within 18 hours. It reached 1 million views in March 2016 and became the first song featuring Ling to reach this number.

Concerts
This song was featured in the Vsinger Live concert.