我已回到中国英语

I am returned to China now, thank you so much for treating me well in the states朋友式I have just arrived to China, and I appriciated your kind hospitality during the time i spent in America.办公式

I have been back to China, you can come to travle when you are free!

I have been back to China for a week.(回到中国已一星期）The first thing I did after I came back to XX was ...I have been back from China for a week.(从中国回来已经一个星期）for a week表示时间段，go 是个非延续性动词，英语中，非延续性动词的肯定句不能和时间段连用。下面这个句子也可以：I went back to China a week ago.

I have been back to China, you can come to travle .

I've come back to China.You can come to China for travel if you get an opportunity.

I'm back in China right now.I am so grateful for your warm reception and kindly help in USA!

I have returned to China. Thank you very much for your warm entertainment during my stay in USA.

I have come back to China. Thanks a lot for the great hospitality I had from you in the US.