"Integer multiple" in relation to "wage" combined with the mention of being in line with Shanghai wages is clear in its intended meaning. And I still don't believe a word of your BS because you opened with an insult, eliminating any possibility you are acting in good faith.

By the way, the "inexplicable" becomes a lot more explicable when you allow for the possibility (in this case fact) that the writer was suffering extreme exhaustion at the end of an incredibly long day.

Why not just apologize for being a jerk and move on?