Advanced technologies revitalize ancient Chinese city

According to He, a deodorization system has been installed, and the real-time monitoring of hydrogen sulfide and ammonia gas on the LED screen reflect the restroom's air quality.

"Lavatories are related to our most basic need. We want to give visitors a five-star experience in the Old Town, and public restrooms cannot be left behind," he said.

Since 2015, local authorities have invested more than 20 million yuan (about 3 million U.S. dollars) in renovating and maintaining public restrooms in the Old Town. Urine data such as sugar level is expected to be introduced in the future.

These public restrooms are the epitome of the ancient city's digital development.

There are 380 high-definition cameras working 24 hours in the Old Town to monitor public security, fire safety and other emergencies, the contents of which are accessed by local police stations and firehouses.

"Facial recognition will be added into the system within the year," He said.

The monitoring system could also indicate real-time visitor flow so tourists can easily check whether the scenic area is crowded on 13 digital information screens in the Old Town or on its official WeChat account.

Two first-aid stations have been providing services at the Old Town since last year. Scanning a QR code or the ID card, one could get Automated External Defibrillators, stretchers, wheelchairs, bandages and other medical supplies for free.

Meanwhile, local authorities have implemented a noise control system which will cut off the electricity to a bar if its noise exceeds 85 decibels ten times.

"Digital integration is an inevitable trend, which could make the ancient city more attractive and contribute to sustainable development of its tourism industry," He said.