Those consequences are not theoretical. The expressway passes close to the Golden Triangle, one of the world's largest illicit drug-producing regions. Criminal networks have long attempted to exploit the route to smuggle narcotics, organize illegal border crossings, move precursor chemicals or funnel proceeds from telecom fraud.

In June 2019, a single anomaly changed the course of an otherwise routine shift. A tourist bus traveling from Jinghong to Kunming arrived at the checkpoint carrying only a driver — no passengers, no luggage or plausible explanation. The driver appeared visibly nervous.

After a thorough vehicle inspection, the officers uncovered 7,530 packets of methamphetamine tablets, weighing nearly 140 kilograms. Thirty officers worked for four hours to dismantle the concealment and secure the evidence. It remains the largest single drug seizure in the station's history.

"Drug traffickers are endlessly inventive," said Zhao Chaosheng, an officer at the station.

"We've seen drugs hidden in fruit, preserved vegetables, fire extinguishers, computers, tea leaves, hardwood carvings … even slippers. Some traffickers risk their lives by hiding drugs in condoms, swallowing them and then taking laxatives to expel the drugs after reaching their destination."

Every officer at the station develops a personal set of investigative instincts, refined through years of experience.

They learn to read subtle changes in facial expressions, listen for inconsistencies in answers, recognize unfamiliar accents, feel for irregular textures, detect unusual odors, examine vehicle structures and search for the smallest traces of tampering.

"Every concealment method leaves a signature," Zhao said. "Our job is to notice what others overlook."

Since its establishment, the station has handled over 1,100 drug-related cases, arrested 699 suspects, seized nearly 3 tons of narcotics and intercepted 65 tons of precursor chemicals.

In 2025, it uncovered dozens of illegal entry cases, nearly 90 smuggling cases worth over 9.17 million yuan ($1.33 million), and hundreds of suspects linked to telecom fraud. A total of 132 wanted individuals have been apprehended as well.

Still, relentless vigilance alone is not enough. Technology has transformed how the station operates. X-ray scanning systems now screen cargo vehicles, cutting inspection times by an average of 20 minutes while nearly doubling efficiency. A"green channel" speeds up legitimate cross-border freight, while trusted logistics companies are placed on a white list for rapid clearance.

Behind the scenes, officers rely on data platforms connected to multiple national and provincial databases, enabling real-time alerts and risk profiling. These tools have shifted border control from reactive enforcement to proactive prevention.

On May 26, 2025, a suspicious cargo van triggered an alert and was entered into the station's monitoring system.

When the same vehicle returned several days later, automated warnings prompted officers to stop it. Inside the cargo compartment, they found 12 individuals attempting to cross the border illegally, along with an organizer. Two suspects were wanted in telecom fraud cases.

Enforcement is only part of the station's mission. A legal education studio operates on-site, offering intercepted travelers on suspicion of attempting to illegally cross the national border a structured process of education and counseling. Since its establishment, the studio has conducted legal outreach for more than 15,000 people, with over 10,000 signing formal commitments not to engage in cross-border illegal and criminal activities.