China plans to bring an asteroid down to Earth

Chinese scientists plan to capture a small asteroid near Earth to study and potentially mine it for resources. They have targeted an asteroid 6.4 meters in diameter and weighing several hundred tons. A spacecraft with a large bag will capture the asteroid and bring it to Earth. The spacecraft will deploy a heat shield to slow the asteroid from 12.5 km/s to 140 m/s upon entering Earth's atmosphere. The scientists aim to study the asteroid and may choose to mine it for valuable resources.

What is the initial velocity of the asteroid before it enters Earth's atmosphere?

What resources might scientists choose to mine from the asteroid?