David Beckham told a news conference in China: "I'm very proud to be an ambassador and help the game here from the very young ages up to the professional level.
"I'm very proud and thankful for this opportunity and I look forward to being part of this project."
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A colder start to the day with outbreaks of rain expected across Wales and southern England.
A further 85 buses are expected to arrive on Tuesday and Wednesday, with officials saying the entire operation will last at least a week.
The reality star had filed a defamation lawsuit against celebrity gossip site MediaTakeOut.com.