Deric Ng

I'm a non PR, bought a flat in 2011 ( exchanged contract in2011), Due to changes of developers, I signed 2 variation contracts before I got the vacant possession in 2019. Now I intend to sell this flat, shall i use rebasing method which I have to get the flat's valuation as at April 5, 2015 ? If yes, the problems was that in 2015, there was no ready units with vacant possession for this project. In this case, can I use the flat surrounding my project to obtain April 5, 2015 valuation? Or can i use 2019 market value as my flat's acquisition price ? Thanks.