According to the Guardian,
On May 20, he boarded a flight to Hong Kong, where he has remained ever since. He chose the city because “they have a spirited commitment to free speech and the right of political dissent”, and because he believed that it was one of the few places in the world that both could and would resist the dictates of the US government.
Reactions from Hong Kong
Roger: His mind is still stuck at the 80’s-90’s.
Tsui: What a retard! Hong Kong doesn’t have freedom of speech anymore!
大魔王: (He) believes that Hong Kong has free speech <— Hong Kong does have the freedom to criticise the US; however, she has no freedom to criticise China.
義人長毛: He exploded bad stuffs of the American. Certainly, he will be protected.
2BG2FAIL: China suddenly defends free speech. (unbelievable)
有幾膠: Is it possible that he’s a spy (for China)? (hehe)
貓汁姫: He came to Hong Kong really because of this reason (free speech)? (hehe)
He should have quite a lot of confidential documents in his hands. He may want to sell them in Hong Kong? (hehe)
中年電車男: That means he has stepped inside the door of the Ministry of State Security of China. I even think that China planned the whole thing. There maybe more stuffs that he hasn’t revealed. Hong Kong Security Bureau should have been eavesdropping him. (I totally don’t believe that Hong Kong knows nothing about it. The whole Immigration Department might have planned it.) Chinese Ministry of State Security might even arrange him to go to Hong Kong and debrief him. In the end, (going to Hong Kong) is less obvious than going to Shanghai or Beijing directly…
I think that he had become a spy for China when he was in the US, or he may have fallen to a honey trap. What was reported was probably less than 20% of what had happened.
Tse: He’s a hero! Hongkongers must protect him!! Don’t let China and the US hurt him!
Wong: I don’t think China will treat him badly.