Domestic application for US patent failed.

Hello, this behavior is not necessarily invalid. According to the relevant provisions of priority, his application in the United States is earlier than your application in China, so you can't go to the United States to claim priority.

However, it does not mean that there is no room for recovery. Compared with China's first application system, the United States implements the first invention system, that is, when there is a conflict between patent applications, the person who completes the invention first will get the patent right. So I suggest you start from here and find the relevant evidence of your invention first.

I hope my answer is helpful to you, thank you ~