Snooker's best and brightest are in China this week for the Shenzhen Open.Formerly the Xi'an Grand Prix, the sixth ranking event in the World Snooker Tour calendar has been rebranded.Top seed and defending champion Mark J Williams suffered an early exit but the likes of Wu Yize and Judd Trump will hope to challenge for the title.Snooker fans are usually treated to plenty of extensive coverage throughout the year with the BBC holding the rights t…