Actually it is good for China to become entangled in a promise of military action on behalf of Pakistan. China has now made itself "responsible" for Pakistan. If Pakistan attacks India (or Afghanistan) China will become embroiled. Hence, China will now keep Pakistan on a short leash ..... I wonder who gets to define the meaning of "attack"? Does a drone strike count? Does a SEAL mission count? Does a cruise missile overflight or, heaven forbid, inadvertent crash, count? This is great. It's about time China started dealing with the complexity of being a world power. Next we can expect China to make the same promise to Iran, North Korea, Myanmar, Syria, Venezuela and Sudan. A truly wonderful alliance of nations.