Booksellers slipped back to mainland China after requesting Hong Kong police drop missing persons cases
Lui Por and Cheung Chi-ping both returned to mainland on the same day they arrived at Lo Wu checkpoint, sources reveal

The two missing booksellers who were allowed by mainland authorities to return to Hong Kong on separate days last week both quietly crossed the border back to the mainland hours later, sources have told the Post.
That was soon after they both asked Hong Kong police to drop their “missing person” cases.
The mystery deepened yesterday, even as it looked like the end the road for Causeway Bay Books, the store at the centre of the storm.
Woo Chih-wai, who worked at the shop until five of his associates disappeared last year, quoted bookseller Lee Po’s wife, Sophie Choi Ka-ping, as saying she was willing to give up the store in May.
Lui Por came back to Hong Kong on Friday, followed by Cheung Chi-ping on Sunday. Both surfaced on the mainland after disappearing last year, accused of delivering banned books across the border on the instructions of associate Gui Minhai.
They raised eyebrows by declaring they did not need any help from the Hong Kong government or police.