I am gonna transfer the customized message which is actually the string in JSON format for representing some information from one parachain to another one. But I can't find the right functions or specific steps, while there are some XCM demos for transfer the tokens between multiple parachains. If anyone have some idea, please contact here to give me your hand, thanks.
All parameters of XCM were almost same as here, How to open HRMP channels between parachains?.
But I couldn't create a new HRMP channel via this XCM.