China is mentioned as one among the northern kingdoms: Mahabharata, Book 6, chapter 9 (MBh.6.9)
The Yanavas, the Kiratas, the Gandharvas, the Chinas, the Savaras, the Barbaras, the Sakas, the Tusharas, the Kankas, the Pathavas, the Andhras, the Madrakas, the Paundras, the Pulindas, the Ramathas, the Kamvojas were mentioned together as tribes beyond the kingdoms of Aryavarta.