Take this opportunity and do not look back. Young, single, just out of college. You are free to suffer the "indignities" of Hong Kong on scraps. Look at it this way. You get to see the world. You fly "heavies." I cannot over-emphasize the importance of that fact. It will instantly make you more competitive for ANY airline job and qualify you for ex-pat contracts if you choose to move on. You made it through Cathay's interview (if you make it.) They are known for having the most technical, thorough, pain in the arse interview anywhere. They also have a very demanding company culture. This is not necessarily a negative, but you will have to be a consummate professional to work for Cathay and everyone knows it.
In contrast, you work for a regional. When the interviews for a major job come up and you are trying to get in on the beginning of a hiring "wave" you will be just like 10,000 other regional pilots. The earliest hires will be those with "big" airplane experience and international experience, those who have proven themselves in the type of operation they are trying to be hired into. If you go regional US, you have not set yourself apart.
Ask everyone you know in the industry how many 25 year olds have "heavy" time they know of. The number is strikingly low.
Cathay is a great career destination in itself. If you change your mind at age 30, 35, 40...then you have a resume that will get you in the door anywhere in the world you wish to fly.
This is a no brainer and if you turn it down I would never mention it again. It would reflect on your judgement and that is a major part of our job.