A decorator is facing legal trial after he intimated a Hong Kong judge. His actions were seen on a CCTV, which captured the moment he used a 12-inch meat cleaver to threaten to kill the said official.

According to the South China Morning Post, the security footage taken from the court was played in public for the first time on Tuesday. The 53-year-old man, Yu Zulin, can be seen taking time to examine his newly-bought blade.

Prosecutors dubbed this as "practice" strokes, all of which was recorded on October 17 last year.

A close-up of the footage shows the man seemingly striking the air in front of him. He does it in swift, forceful movements about four to five times after he drew the cleaver from its clear packaging in the court building, One News Page reports.

The District Court heard Yu was waiting for an appeal judgment at the time. It regarded his civil claim against the police that was originally heard in 2013 by Justice Wilson Chan Ka-shun, which is the alleged victim in the present case.

After receiving the written judgment, which ruled his appeal bid unsuccessful, Yu was seen on CCTV studying television screens displaying the day's court list, which had the schedule and location of each judge.

Chan's clerk named Danny Kwan Man-yu testified that he first noticed Yu when the latter entered at about 9: 50 am. He would then settle at the edge of the public gallery, particularly in the seat closest to the judge, which is also next to a narrow passage leading to the bench.

The clerk said Chan was delivering a judgment when Yu pulled out the brown-handled knife, which prompted him to stand and point at him warning him to "wait."

But Yu reportedly ignored him and walked towards the bench while shouting: "Chan Ka-shun, corrupt judge, I will chop you."

Yu has pleaded not guilty to three counts of criminal intimidation, criminal damage, and possession of an offensive weapon. The trial is expected to continue before Deputy District Judge Don So Man-lung.