This is exactly what happened during the Japanese invasion and WW1. China sent labouers to support the Allied war effort and China got nothing in return. To add insult to injury those labouers were left to die and fend for themselves. The west was literally doing nothing while China was invaded and they even were secretly supporting Japan. After WW2 they threw China under the bus again by preventing China from reciving any reparations and rewrite history saying Hirohito was just a powerless figure when he is clearly not.
This could even apply to modern times. China stood with the US against terrorism but when Uyghur Terrorist attacked China the west criticzed China.
