"A year and a half ago, the world came together in Paris around the first-ever global agreement to set the world on a low-carbon course and protect the world we leave to our children", said the former USA president.
Hua said the Chinese government will take "concrete action" in response to climate change.
French President Emmanuel Macron has offered his own version of Donald Trump's campaign slogan with a call to "make our planet great again" following his American counterpart's move to pull the USA out of the historic Paris climate accord.
The Paris Agreement is an worldwide attempt to slow global warming and mitigate its worst effects.
Calling the Paris pact a "historic quantum leap", she said that Germany would live up to its "obligations under this agreement, particularly on financing of climate assistance for the poorest and most vulnerable countries in the world".
The White House decision to withdraw from the Paris climate deal has sparked widespread criticism from European leaders and beyond. "There is no way", Macron said.More news: 8 foreign fighters killed in southern Philippines siege
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"Tonight, I wish to tell the United States: France believes in you".
Trump has repeatedly cast doubt on the science of climate change and once called it a hoax perpetrated by China to weaken US business.
World leaders have clamoured to condemn Donald Trump for pulling the United States out of the Paris Agreement.
"I was elected to represent the citizens of Pittsburgh, not Paris", he commented.
And with the Paris decision, China will assume global leadership in renewable energy - the principal growth industry of the future, as Trump embraces the fantasy that America's energy future lies with coal, the technology driver of the 19th century.
"This is an insane move by this president; the world depends on a sustainable future", said Governor Jerry Brown of California.