https://www4.aeroplan.com/whats_new/...257_2016_06_20

Effective for travel June 21, 2016 and for travel prior to March 27, 2016 please note the following accrual structure changes for Air China:

Earn 125% of the miles you fly in booking classes J, C, or D. For travel between March 27, 2016 and June 20, 2016 earn 150%.

R class is not available for accumulation. For travel between March 27, 2016 and June 20, 2016 earn 125%.

E class is not available for accumulation. For travel between March 27, 2016 and June 20, 2016 earn 90%.

Earn 100% of the miles you fly in booking classes M or H. For travel between March 27, 2016 and June 20, 2016 earn 75%.

Earn 100% of the miles you fly in booking class W. For travel between March 27, 2016 and June 20, 2016 earn 50%.

Earn 100% of the miles you fly in booking classes L or K. For travel between March 27, 2016 and June 20, 2016 earn 25%.

Earn 50% of the miles you fly in booking classes U, Q or V. For travel between March 27, 2016 and June 20, 2016 earn 75%.

Earn 50% of the miles you fly in booking class G. For travel between March 27, 2016 and June 20, 2016 earn 110%.

T class is not available for accumulation. For travel between March 27, 2016 and June 20, 2016 earn 50%.

To learn more consult the Air China accumulation structure right now.