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The decent loaf Tigertiger is speaking about is what we are used to when we buy a loaf in the shop. These loaves are made with additives called "Bread improver" and this combined with techniques and ovens that surpass our amateur skills.
"Real" (Your own made) bread is not as fluffy as factory bread but easily outdoes it in taste, especially here in China where all bread is sweet and characterless. If you want factory bread then go to a shop and buy it. Don't try to make it yourself. (The French Café has good bread but it is pricy).
You can buy Bread improver here as well and add it. (Angel Yeast Co. Ltd 1Kg bags at Metro). (Mantou improver in small sachets works as well and is sold at various shops).
Whole-wheat flour is sometimes sold at the Wicker Basket. Adding 20% of this to plain flower already gives a much healthier bread. Carrefour sometimes sells wheat bran which, when added to plain flower, mimics whole-wheat flower.
I add all kind of additional things as well to get various flavors like:
Oatmeal.
Buckwheat (Originally from Yunnan).
Cooked rice (White, brown and red).
Sunflower seeds.
Line seed.
Flax seed.
Hemp seed.
Sesame seed.

Special bread can be made with raisins, nuts, dried mango slices and olive flakes.

Indeed there is a new road specially for tourism going all the way to Jiaozixueshan.
Also the road is at least 5 years old it is not on most paper and digital maps.
On Google maps you will not find it but it can be found at QQ-maps see link for the entrance of the road.

map.qq.com/[...]

It can be found as well on open street maps were it is labelled as X002.
It starts at the junction of the third ring road and the motorway to the north west (Fuming).
First follow the X030 for a hundred meter and then the road starts going first north east.
www.openstreetmap.org/#map=17/25.11398/102.66496

The road ends at the Jiaozixueshan park entrance

What you have been using is self-raising flour (That is flour with added baking powder). And it seems to have worked ;-)
For pizza I simply use ordinary flour without any additives. Best is to use the high gluten form. This is sometimes indicated on the packaging but can be determined as well because of its high protein percentage. High gluten is around 11%. You find lots of low gluten flour in China which is used for steamed buns etc. They are low gluten and have protein percentages typically below 10%.
Cheapest place is Walmart which now as offers for 5Kg for below 20 kuai.

Mountain bikes are available in many different qualities and prices and offcourse the good stuff will cost you. The only real problem is frame size. If you are big then bad luck; they dont have those and you better bring your own.