i have not doubt you 美做的贡献很自信

Again, my point is the 10th cake can be best one, it does not mean the first 9 cakes are useless. For me, I know, if without training in China, not only knowledge, but also many other things such as how to survive in tough situations, I will not be able to take the 10th cake. If your previous training had not helped you, sorry for you. Not saying for others, I deeply believe my OK life not only from the training here in the US, but also, actually largely, from my training back in China.