thx max for pointing those shade issues, i'll take care of that Hi tracker and thx for the feedback, The definition of a city fluctuate greatly depending of the country, in france the definition of a city is when you have more than 5000 inhabitants but that would hardly be a small village in china so i guess your town could be a great city in middle age!
for the bridges i can' add new ones because it's the map of a real city so it is based on reality and i have already drawn all the existing bridge of the city