Zhang Ziwen left home early in the morning and quickly realized he was being surveilled. Whether eating breakfast or riding the bus, people were always tailing him. But they weren't working alone; Zhang Ziwen estimated that there were four groups of five people each. They didn't allow him to leave their sight, and at least three cars followed him as a backup. It was abundantly clear they had mobilized a good amount of manpower to tackle him.
These people skillfully blended in with the crowd, making them quite hard to spot. Their surveillance was of a high standard.
