Arranging a hike in DaMeiSha (Shenzhen)

Hey all. I wonder if anybody can assist me in local knowledge and also want to join a group. I want to organise a hike on the weekend of the 13th to go up the rock river by the dam to the east of Shenzhen behind ocean world (resort in next bay to DaMeiSha)
I have done this Hike before and it was great fun leading up to water falls then a small village but I don't know what it is called as it has proper tracks so I guess it is a proper hike area??

Can anybody assist so I can plan it and post up the route. The plan would be to catch the bus in the morning from theatre to this area then hike all day dropping down into DaMeiSha for a beer on the beach.