this is bbc news. our top story. the us has reached a deal to drop charges against wally executive allowing her to return to china from canada. china s central bank has strengthened a ban on cryptocurrency trading. in may, chinese banks and financial institutions were banned from trading in bitcoin, ethereum and other platforms. but on friday, beijing extended the ban to overseas firms. 0scar williams grut, city editor at the evening standard here in london. i asked him how this announcement is different since china first banned trading crypto currency back in 2019. i think what is different is the scope and the extent of the band and the context. in terms of the scope he had seen notjust the people s