How to cancel the hotel voucher included in the ticket?

Generally can cancel, the operation is as follows:

After searching for a suitable flight, there is a drop-down arrow in front of the word reservation. After clicking, you will find a check mark in front of the hotel coupon. Just remove this check mark. If you book a room again, you won't add the hotel coupon.

Precautions:

After some hotel coupons are cancelled, the ticket price will be higher. If you haven't paid yet, you can try to cancel the fare. If the reservation has been made successfully, it cannot be cancelled.