I'm not sure about adverse possession, but my understanding is that the church behind Cheung Kong Centre is the only place in Hong Kong that privately owns land

I'm not sure about adverse possession, but my understanding is that the church behind Cheung Kong Centre is the only place in Hong Kong that privately owns land rather than leasing land from the government for 99 years. It would be better to sort out efficient use of land before the leases need renewal, but at least there's a mechanism to reclaim truly unused land.