Chan Yu Jak Born Sungai Canton and Emigrated to Canada

I'm looking for information of Chan Yu Jak - born Sungai, Canton and emigrated to Vancouver, Canada. Brother of Chan Yu Koon aka Jimmy Chan, 99 Lemon Street, New Plymouth; and Chan Yu Gai who came to New Zealand. Probably late 1920s emigration. Their father was Chan Yoon Dat. Their cousin was Chan Pui Lam, and they go by the surname of Thackery in New Zealand-