C156 Drug to flour conversion

"The Drug Enforcement Unit of the police station. Captain Liao held out the results of the 'drugs' he had checked from the Yichun bar the night before. His face was livid, and he wished he could tear this piece of paper into pieces." "How could this happen? How did the K powder become flour?"

After the drugs were brought back last night, they were sent to the Evidence Department as evidence