In a black puffy jacket with the hood pulled up, and dark glasses obscuring his face, Killara High student Tzu-Yang Fang, 18, made a brief visit to Hornsby Local Court registry on Wednesday.

Mr Fang has been charged with selling a drug to classmate Henry Kwan, 17, who jumped from his family's third floor apartment on Sydney's north shore on June 5.

Tzu-Yang Fang: he did not want to be photographed. Credit:Wolter Peeters

Mr Fang is accused of selling one hit of the substance to Henry between 12:30pm and 3pm on the same day the 17-year-old fell to his death. Mr Fang intends to fight the charges, a court has heard.

Mr Fang, who is on bail, did not appear in court on Wednesday morning, with his solicitor telling the magistrate he was a young man who did not want to be photographed. Mr Fang was pleading not guilty to the charge, the solicitor told the court.