update on averbury project., page-4

Good business practice would normally honour all agreements previously signed. I would not be too worried that it was not mentioned. The implication being that it is business as usual.
Scanman, I would agree with you that Jinchuan would probably want a codicil to the agreement to give them assurance and potentially (and this is my pure speculation) a sweetner to accept the ZFX offer. This could be a longer contract time frame or all the increased volume or both.

The bid ends tomorrow. We need to wait and see what happens.