Prehistoric: Two Time Travelers Go to Prehistoric Times

Did you get a mission system when you traveled through time? Am I here just to complete my mission? What? The great god Pangu has not fallen yet? The Ancestral Dragon was transformed from the claws of the Chaos Dragon. Does the Chaos Dragon want to be resurrected? Should I help or not? This prehistoric period is a bit chaotic, so I'd better improve my strength! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.