From the Aeroplan website:

As of January 19, 2017 Cathay Pacific and Cathay Dragon have joined the Aeroplan Program as Aeroplan’s newest airline partners.

Earn miles for travel on select routes operated by Cathay Pacific and Cathay Dragon. Some exceptions may apply.

Eligible routes between Hong Kong and

- Chiang Mai, Thailand
- Phuket, Thailand
- Bangkok, Thailand
- Cebu, Philippines
- Manila, Philippines
- Kuala Lumpur, Malaysia
- Ho Chi Minh City, Vietnam
- Hanoi, Vietnam

Cathay Pacific is a Hong Kong-based airline offering scheduled passenger and cargo services to some 200 destinations worldwide, using an ultra-modern fleet of more than 140 wide-body aircraft, including the technologically advanced Airbus A350.

Cathay Dragon is a wholly owned subsidiary of Cathay Pacific. The airline operates a fleet of 42 passenger aircraft serving 52 regional destinations, including 23 cities in Mainland China. Cathay Dragon is widely recognised for its product and service quality, winning numerous awards and accolades in recent years.

Aeroplan Miles earned on all eligible Cathay Pacific or Cathay Dragon flights do not count toward Air Canada Altitude™ status.

Star Alliance™ Gold and Silver Benefits are not extended by Cathay Pacific or Cathay Dragon.

Redemption on Cathay Pacific and Cathay Dragon will come later.