I visied one of the concubine villages last year, and during that time our tour guide the village we were visiting was a concubine viliage for the officialis in ancient China, whem many officials built these gardens for their concubines for fun. This is what I know. And when you visit there with a Chinese tour guide, you will get the similar information. Good luck!
If you want to travel in Hong Kong, most people there can speak English.
Try to prepare some cards with most common used phrases written in English.
Be careful with your bag and purse every time you go out, especailly in public transportation.
china is a miracle country,if i were you,i will watch the <the wild china>produced by BBC before i go to china, because in china ,there are higgest mountain,the dangerous desert,the oldest culture,beautiful plain,devise ethnic culture,and the most delicious chinese food,it is not easy to find out all the beauties of china in 15 days,so you should make a plan
if you come to beijing,you can message me in the forum,maybe i can give you some help,please freely to contact with me
September is the best time to visit Jiuzhaigou and Huanglong. Fly there or take the bus from Chengdu, another beautiful city, where you can also see the panda or climb another mountain- Emei Shan. Have fun.