Why does China have much better infrastructure than the USA?

New York and San Francisco look dirty. Subway in NY looks old. Bridges look old. Potholes in the road. Always construction and yet they still can't keep the roads looking nice. P**p on the sidewalks. Americans may be richer than the Chinese but the Chinese cities are so clean, the roads are better, faster trains and the trains look better. Friendlier people too!