Final answer:
China having about one-half an elevator per thousand people suggests a low product saturation level in the elevator market, indicating growth potential.
Step-by-step explanation:
That China has about one-half an elevator per thousand people is indicative of a low product saturation level. This means that the market could potentially accommodate many more units because the current number of elevators is relatively low given the size of the population. The fact that there's a low product saturation indicates that there is room for market growth in the elevator industry within China. It is important to consider the large population size and the economic growth potential when analyzing the elevator market in China.