Keep
When he first met Iceland, he immediately thought 'I'm keeping him'. He tried to think of a plan that would ensure that Iceland was with him. Hong Kong knew that it was wrong to think of someone as an object or an animal but he couldn't help it. Iceland was just way too cute with his pouty lips, odd eyes and soft tuft of silver white hair.
After Hong Kong met Iceland (and his family, because they were always right over the boy's shoulders), he realized that he couldn't just keep the Nordic like he did with his panda. He couldn't just grab him and demanded to China that they keep him. He would need to work hard to win Iceland and his brothers over.
This would definitely be a great challenge as Iceland was quite antisocial and Norway was making sure no one laid their hands on his precious brother. But Hong Kong liked challenges. Hong Kong will definitely win them over.
He did and kept Iceland.
This one seems a bit weird but I hope you understood it.