Zhāng Jiāháo, known professionally as Arno, is a Chinese singer under CHROMOSOME and Nouer Entertainment. He is a member of the project boy group ALPHA DRIVE ONE, formed through the 2025 reality competition show Boys II Planet. Zhāng Jiāháo, known professionally as Arno, is a Chinese singer under CHROMOSOME and Nouer Entertainment. He is a member of the project boy group ALPHA DRIVE ONE, formed through the 2025 reality competition show Boys II Planet.