While the Buick Regal is selling quite well in the mainland China market, users in the North American market are still eagerly awaiting the return of this classic model. The Buick Regal, manufactured by Shanghai GM under the authorization of General Motors and based on the Opel Insignia, holds an extremely important position in GM's sales volume map in China. The new Buick Regal plays a significant role in the lineup, whereas in the United States...