Hi, I am planning fly with family Jakarta to Dubai via shenzen transit TWOV

Budiman, your itinerary is definitely eligible for 24 hour visa free transit in Shenzhen and you do not need any kind of visa. In other words, if you plan to stay airside (transit area of the airport), you will not be a subject to immigration and customs control. However, if you plan to exit the airport, the first thing you will do after the landing is to approach transit counter where you will apply for a temporary entry permit by presenting your flight tickets. Whether the permits will be granted to you depends on discretionary decision by an airport official on the day. Hopefully, they will be granted and after that you can proceed toward the immigration in order to explore the city for some time. The best way to reach the center of Shenzhen from the airport is by taking a metro.