Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Angeles City to Shenzhen as you normally would.
CRK and SZX are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. CRK to SZX refers to a flight route from Angeles City Clark Intl Airport to Shenzhen Airport.