Core Viewpoint - The article highlights the illegal sale and use of OBD (On-Board Diagnostics) devices that allow vehicles to bypass emissions testing, posing risks to environmental safety and road security [1][11]. Group 1: OBD System Overview - OBD systems monitor vehicle engine performance and emissions, alerting users when emissions exceed legal limits [1]. - If certain diagnostic checks are incomplete, vehicles may fail annual inspections, particularly if more than two checks are not ready [1]. Group 2: Illegal OBD Devices - Online platforms are selling OBD devices that can manipulate vehicle data, enabling "problem cars" to pass inspections unlawfully [1][6]. - These devices act as deceptive programs, altering the data sent to inspection systems to show compliant results regardless of the vehicle's actual condition [6][9]. Group 3: Criminal Activities and Law Enforcement - A criminal gang involved in the production and sale of these OBD cheating devices was recently dismantled by Shanghai police, revealing a black market for such products [11]. - The gang leader, identified as Zhong, operated multiple online stores and utilized social media to evade detection while selling these illegal devices [9][11]. - The police have taken legal action against the suspects for environmental pollution and providing illegal tools for manipulating computer information systems [11][13]. Group 4: Regulatory Response - In response to the issue, the Ministry of Ecology and Environment, along with other departments, is working to enhance OBD system functionalities to prevent tampering and improve vehicle inspection processes [13]. - Authorities are urging the public to avoid purchasing these illegal devices and report any suspicious activities related to OBD cheating [13].