Are there many S;pore ppl install Datukgong? is usually they install inside the flat unit?

Both.Datuk Gong would choose his preferred location for the altar by appearing in the dreams of devotees or by voicing his request through a spirit-medium.Usually located in the front corners or at the back of Chinese houses,shops,factories or temples,fengshui (椋庢按) sometimes plays a role in the site of the altar,especially for those who set up the altars in factories or at home.