Amusement parks back then weren't similar to the ones these days. Rong City was still a newly developed city at that time, and the amusement parks were located in suburban areas.
There was an undeveloped cottage area near the amusement park. Da and his three friends were hiding in one of those cottages.
As the Huo Family's RV parked in front of the amusement park's gate, one of Da's men happened to be nearby, shopping for cigarettes. He spotted the RV immediately.
Such a large RV from a well-known company would have been very eye-catching at that time.
He did not only see the RV but also saw the three well-dressed kids from the Huo Family.
Looking at the RV which he knew would be worth millions, the man's eyes glowed. He went back and talked to Da about it. All four men believed that the RV was their best chance.