Herbs that Warm the Interior

Based on your knowlege of its function, what are the entering channels of Gan Jiang (zingiberis rhizoma)?

Gan Jiang warms the middle jiao, so it enters the SP and ST channels; it warms the Lung to transform phlegm, so it enters the Lung channel; and it rescues devastated yang, so it warms the Heart channel.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. p. 681 [Q61]