Very important that OP brings this right back to the original conversation and not allow him to move from it one bit.
"You ended our marriage 6 weeks ago because you want to go to travelling to America or China onnyour own".
When he tries to move it from this keep bring ing it back.
Don't allow him to change his reason because he has kept giving it more thought.
Keep referring back to his ending 6 weeks ago and for travelling.
"Since then you have mentioned other things, but as far as I am concerned our marriage ended 6 weeks ago because you plan on traveling".
It suits him now to move it to some other reason but you can keep it on the travelling.
Make sure you tell people that HE ended the marriage to go travelling.
That he has now said something else is neither here nor there.
He doesn't get to control the narrative.
He has come to the conclusion that staying in a "living together but not together" is a scenario that will suit him best.
He travels, you carry on doing everything.
He's a joke.
Steel your back and be very firm.
HE ended the marriage and go for divorce.