QR codes are also improving the efficiency of government services. The Health Bureau of Beijing's Haidian district has added QR codes to food safety notice boards in more than 8,000 restaurants and cafeterias. Scanning the codes lets consumers check updated information about the restaurants' food safety record.

According to Zhang Chao, director of a QR code working group at China's Internet of Things Chamber of Commerce (IOTCC), QR codes have created a new way to pass information between online and offline users, as well as between people and inanimate objects.

"QR codes make information more accessible to every individual. Their wide application in the public sphere may promote public interaction with companies, media institutions and even the government," Zhang said.

However, security issues and a lack of standardization pose problems for the codes' future development.

"Many software companies are engaging in QR code-related business but there is not yet a unified standard for the codes. QR codes created through different generative methods may not be compatible with each other, which may confuse users," Zhang said.

"Since QR codes have such large storage capacity, they may also be used to spread viruses. There have already been some cases in which a user's privacy has been invaded after he or she scanned a QR code, so it is quite necessary to check the code's distributor and validity before scanning," Zhang said.

Wang said his company has made efforts to prevent their QR codes from being abused.

"Anti-virus software for smartphones is quite necessary. However, we are also improving security checks over our software to facilitate the decoding process," Wang said.