From an Asia Maritime Transparency Initiative (AMTI) report dated May 25, 2018 (note Lawak Island is referred to by its international name, Nanshan.)
https://amti.csis.org/philippines-launches-spratly-repairs/An empty field on Nanshan Island has been converted into a helipad as of February 20, 2018.
Before:

Image dated February 20, 2018:
