The prime minister raised eyebrows on Monday when he described China as a "customer".

"I don't see it that way at all," Ms Bishop told reporters in Perth.

"I think our relationship with China is one of deep and mutual respect.

"We are partners. We are trading partners. We have worked together in a whole range of areas.

"And so, the relationship is one of equals."

Ms Bishop, who is not contesting the election, refused to say whether the Liberal Party would be in better shape if she and Malcolm Turnbull were still in charge.

"That's a hypothetical - there's no point in looking back - we just look forward," she said.

"I think Scott Morrison will continue to be a very fine prime minister."

Ms Bishop has previously ruled out accepting a foreign posting when she walks away from politics.

It appears Joe Hockey's recent decision to finish up as US ambassador hasn't changed her mind.

"I have had the number one diplomat's job in Australia - I was foreign minister for five years," Ms Bishop told reporters.

"That's the best job you can have in the foreign service in Australia, I can assure you."

Ms Bishop said she would pursue work in the private sector, rather than a government job.

Australian Associated Press