The Duke of Cambridge is to deliver a speech on the illegal ivory trade for broadcast on Chinese state TV, as the country's president arrives in the UK for a state visit.
It is the third time Prince William has spoken on the subject in the past year.
President Xi Jinping will arrive in the UK this evening for a four-day visit, during which he will stay as a guest of the Queen at Buckingham Palace.
He and wife Peng Liyuan will also dine with David Cameron at Chequers.
Prince William, who has worked at forging a relationship with China, has recorded his speech for the Chinese state TV channel CCTV1.
He raised the issue with Mr Xi when they met in Beijing earlier this year and his broadcast will form part of a series of programmes called Let's Talk.
'Criminality'
China imposed a one-year ban on the import of ivory in February, amid criticism that demand among Chinese consumers is fuelling poaching in Africa.
The Born Free Foundation, a wildlife charity, says "tens of thousands" of elephants are killed for their ivory every year.
In an address in Washington, Prince William condemned the illegal wildlife trade as "one of the most insidious forms of corruption and criminality in the world".
Image copyrightAFPMeanwhile, large red flags of the People's Republic of China are already lining The Mall in central London, along with the union jack, in preparation for the official welcome on Horse Guards Parade.
The Communist leader and Ms Peng will arrive privately at Heathrow Airport, greeted on behalf of the Queen by Viscount Hood, later on Monday.
Who is China's President Xi?
- Born in Beijing in 1953
- Son of Xi Zhongxun, a revolutionary who helped to found the People's Republic of China
- Father purged in 1962, Xi sent to work in a remote village aged 15
- Joined Communist Party in 1974
- Became party chief of Shanghai in 2007
- Communist Party leader since 2012
- Pro-business, anti-corruption
- Married to actress and singer Peng Liyuan since 1987
China's ambassador to the UK, Liu Xiaoming, said on Sunday that his country does not "shy away" from discussing human rights.
The UN human rights council has previously expressed concern at the arrest of dissidents, the continued use of the death penalty and the use of torture in prison in China.
Mr Xiaoming said he doubted Labour leader Jeremy Corbyn would raise human rights abuses during a state banquet at Buckingham Palace this week after Mr Corbyn's spokesman said he would use the visit to discuss the issue.
Mr Cameron, in an interview with CCTV1, said Mr Xi's visit was a "very important moment" and hailed a "golden era" in ties between the countries.
Chancellor George Osborne said on his return from a week-long visit to China last month that it was the government's intention to make the UK China's "best partner in the west".
