The hospital is using the lock-out as a bargaining tactic.

(Tehran) is now using the tactic of dragging out talks as long as possible. I do not think we can expect Iran to clarify its position any time soon. I would rather suggest that this will not happen before March 6.

Chen is using the tactic of violating the 'five noes' with the argument that the situation has changed.

It is a diversionary tactic,

In Rome, Matt had told her, ‘I knew that if I kept up my playing, we would have a baby.’ That was what music represented to him now: a bargain he had sought with fate. In a less anaemic age, he would have sacrificed virgins or immaculate lambs.

Russia has shown it's not above the temptation of using some bargaining power or blackmail. It shows that if there is a way to get some political-economic advantages from a temporary weakness of your partner, the Russians will use it.