Smart cities may have their own unique objectives but     1     they have in common is an understanding that Internet of Things technologies can improve efficiency and quality of life.

Indeed, smart city apps have shown they can help a city contain the spread of a pandemic (大流 行病), helping to turn the economy from decrease to     2     (grow). We have seen some smart city apps in many parts of China.

A popular payment app in China has developed a smart system which     3    (call) the Health Code. It uses red, yellow, or green symbols     4     (identify) whether a person is potentially a high- risk candidate. The smart system began as one of the functions of the payment app, a function which was     5    (original) intended for the app’s staff in China, and later developed as a national standard function in some popular apps. Now the smart system, the Health Code, has a new function which     6     (indicate) whether a person can enter public places through analyzing the data     7     (collect) to see whether that person has had contact with those who have picked up a pandemic disease. The Health Code has avoided the need to over-tighten social distancing measures that could result     8     a huge economic loss while at the same time picking out possible infection     9     (case), and it’s managed to reduce infection rates in cities     10     it has been used.