The green and white seven strings should be made in Japan, the green one is ZK- 1, and the white one is AC-T7.
After Kobayashi performed in Changchun, he left Schechter ZK-T6 of Bai Liuxian in Li Sanqin, the organizer of Changchun at that time. His family is Schechter's agent, and you can definitely buy the Liuqin at his home.