It is in their website

回答: please tell me rationwangmiao2019-03-14 08:49:46

Just ignore the Vietnamese words, read the English instruction right after the first few lines. 

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thank you -wangmiao- 给 wangmiao 发送悄悄话 (0 bytes) () 03/14/2019 postreply 10:06:25

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