Don't know anything else what's been made public/leaked, it's a big deal that will make the GCC uncomfortable, but this isn't something new or in response to Trump's aggression, it was coming West pushed Iran into a Russia China alliance.
I think Iran really needs someone to fill the void for a short term, be it China or Russia. Iran should try to milk China as much as they can build infrastructure etc putting China's long term goal behind for a while.