I scanned the blog quickly to see if this question was already answered - if it has, I apologise for asking again. I will travel from SGN to HKG in early April 2019 and was wondering if there is any information regarding any upgrade bid offers between these two sectors? My preference is not to spend more $ on a higher economy class ticket, if I will not receive a bid upgrade offer. Although, from reading former posts, it appears that even if I received a bid upgrade offer, it will be exceptionally expensive, thus I may have already answered my question .