354机甲少女骑士团 (354 Jījiǎ Shàonǚ Qíshìtuán)

Background
"354 Mecha Girl Knights" is a song written by Yu Jianliu. The story takes place in the future in the year 2159. The Pacific's second largest city, Tigris, established a National Special Machinery Institute (NSMI). Here, the weapon testing team was known as 354 Mecha Girl Knights. After Tigris suffered from the attacks of unidentified mechas, the team started their adventure, fighting off the enemy and refusing to give up if they fail.

This song is featured on the album of the same name.