Correct!
Although China shifted from panda gifts to a policy of high-priced loans in 1984, Mexico has retained ownership of the locally born pandas since their lineage traces to gifted pandas.
In 1981 Ying Ying gave birth to Tohui, who in turn mothered Xin Xin (with Chia Chia, a gifted panda originally at the London Zoo). Xin Xin is the last living panda not owned by China.
From the aforementioned Wikipedia article.
This actually blew my mind, I was like “no way are there any pandas in the world not owned by China!” but I was wrong. lol