SYDNEY, Australia — Since he was arrested in 2010, Matthew Ng has lost his $100 million business, his health and his family.

He has been kept apart from his wife and three younger children, whom he sees only sporadically. His eldest daughter fell into a deep depression, stopped eating and died.

An Australian businessman who had been working in China, Mr. Ng was sentenced by a Chinese court in 2011 to more than 12 years in prison on bribery and fraud charges. His lawyer contends that the case was fabricated to allow a Chinese state-owned company to confiscate his business.

In 2014, he was transferred to Australia under a bilateral treaty that allows prisoners to serve their sentences in their home countries.