Two shopping malls in Shenzhen, China have installed a novel anti-smoking system. The technology involves special glass doors in men’s restroom cubicles. These doors turn transparent if they detect cigarette smoke.

This measure directly tackles a persistent problem in indoor public spaces. According to the South China Morning Post, the system activates within seconds of sensing smoke. A posted notice warns users they risk becoming “famous online.”
How the Transparent Door Technology Works
The glass remains opaque during normal use. It provides complete privacy for the occupant. A built-in smoke sensor is the key component.
If someone lights a cigarette, the sensor triggers a change. The glass quickly becomes see-through. This exposes the smoker to everyone outside the cubicle.
Mall management reports positive feedback from visitors and tenants. The system was first tested in August. It became permanent after proving effective.
Public Reaction and Legal Considerations
Online reaction has been largely supportive. Many social media users praised Shenzhen’s innovative approach. Some called for nationwide implementation to solve a common nuisance.
However, privacy concerns were also raised. Lawyers note potential legal risks if the system malfunctions. The malls say they will fine-tune sensors to ignore steam or perfume.
Staff will also install a manual reset button. This allows correction if the glass clears by mistake. The goal is to target only tobacco smoke.
This use of smoke-detecting glass doors represents a drastic shift in enforcing no-smoking rules. It highlights the ongoing challenge of changing public behavior. The experiment in Shenzhen is now being watched closely by property managers across China.
Info at your fingertips
Q1: Where is this smoke-detecting glass being used?
It is currently installed in men’s restrooms at two shopping centres in Shenzhen, China. These are the Shuibei International Centre and the Shuibei Jinzuo Building.
Q2: Why did the malls install this system?
They received numerous complaints about people smoking inside washrooms. Previous methods like signs and small fines were largely ignored by offenders.
Q3: How does the glass door work?
The glass is normally opaque for privacy. A built-in sensor detects cigarette smoke. When triggered, it makes the glass transparent within seconds, revealing the smoker.
Q4: Are there any privacy concerns?
Yes, some have raised privacy issues. The malls state they are adjusting sensors to react only to real smoke and are adding a manual reset button in case of errors.
Q5: What has the public reaction been?
Reaction on social media is mostly positive. Many users support the idea and want it implemented in public toilets across the country to deter smoking.
Q6: Is smoking in public places illegal in China?
Shenzhen has strict no-smoking laws for all indoor public places. This shopping mall policy is an extension of that city-wide regulation.
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