https://www.cathaypacific.com/cx/en_...arketcode=QAWW


Economy M may be under the "Economy Standard" basket as shown on this page.

In which case, this is governed by these rules:

https://www.cathaypacific.com/cx/en_...ode=QA&class=Y

Also since it's a stopover trip, the one to "worldwide" applies to you, instead of to Hong Kong?

Anyways the following is the to Hong Kong link:
https://www.cathaypacific.com/cx/en_...arketcode=QAHK