The tenderloin is the strip of meat on the inside of the vertebrae of food animals, especially the hindquarters.

This part of the meat is firm and chewy, but also high in fat, so it is not dry to eat. Pork loin is the best part of the pork chop. Steak made from beef loin muscle is called sirloin steak.

How to choose a pork loin:

The pork loin is also divided into the outer and inner loins. It is the outer loin that runs along the entire back of the spine, so it is also known as the through loin, the flat loin, and the hard loin, and is the more tender and leaner meat.

The tenderloin, located on the lower side of the outer spine, is a strip of meat between the loin and the water dividing bone, and is long and round, with a slightly thinner end, making it the most tender meat (it is also called loin and willow meat). Because the loin is so small (there is only one loin and the outer loin in a loin), the outer loin is often used in place of the loin in cooking.

Reference: Baidu Encyclopedia - Tenderloin