hi chris, i'v been living here for one year and i think the place mentioned is just in the shopping area, where you will find nanya square, carrfour and some small shops.as for the hotel i think you can check it out when you google it in chinese. and the price should be around 100-200rmb per day. i dont know how long time your stay would be but if you want longer stay i am sure there must be something more cheerful and cheeper. for example 家家度假公寓 which is located in haidian island(the island im living in and i think its a good place in haikou,haha) and near a sanck street and having universtity and some supermaket around..
also you can google 海口度假公寓，or 海口家庭旅馆 to find some others.

hello Miss Hong thank u very much for your reply.According to the info i gather regarding haibin apartment hotel,it is a very beautiful service apt. the picture post in tripadvisor is very beautiful.I will appreciate if u could assist helping to get the telephone number of haibin apartment hotel.personally thank u when we arrive on 25th may. any other good hotels recommendation near the night market.thank u