For phase two, Zhang recruited four Vietnamese and two mainland Chinese experts skilled in advanced drug production techniques. They operated out of a warehouse located at 47 Cat Loi Street, Nha Trang.
In the photo above, military-grade pots were used to heat precursor substances mixed with activated carbon at 200 degrees Celsius, the final step in synthesizing ketamine.
When police arrived, the group was still boiling five pots on industrial gas stoves, each containing 14–15 kg of solvent, ultimately yielding around 10 kg of pure ketamine.