to the left it says: Shanghai 07.10 1904
to the right it says: Answering your - ? - letter in the next mailing.
Bottom: Dear Mr Posten......
Back from wonderful Japan I am sending you
???? Greeting ????
The lower line is difficult to read as it is partly covered up.
Just for fun I was looking in internet for German last names starting with Posten and there is one :Postenrieder, so Dear Mr Postenrieder
I guess the last line should be herzlichste Grüße Ihr ???
Kindest greetings yours ?????