The Chinese diplomat is expected to arrive in Tehran on Tuesday.
Xie visited Tehran in April 2016 and held talks with former Iranian deputy foreign minister for Arab and African affairs, Hossein Amir-Abdollahian.
During their meeting, the two sides warned against any foreign intervention in Syria and stressed that the future of the war-hit country must be decided only by its people.
"No foreign power must interfere in issues related to Syria's future. We must allow the Syrian people to decide for themselves about writing a new constitution and choosing a president," the Chinese envoy said.
Xies upcoming visit to Iran will come a few days after delegates from the Syrian government and opposition groups attended a fresh round of peace negotiations in Astana, Kazakhstan, in a new phase of a diplomatic process mediated by Iran, Russia and Turkey.
[caption id="" align="alignnone" width="555"]
Representatives of the Syrian government and the opposition groups along with other attendees take part in the second session of Syria peace talks at the Rixos President Hotel in Astana, Kazakhstan, on February 16, 2017. (Photo by AFP)[/caption]Thursdays discussions, which were held behind closed doors, have been viewed as a warm-up to a separate round of UN-led talks on the Syria crisis slated to be held in the Swiss city of Geneva on February 23.
Read more:
- Astana summit aimed at facilitating intra-Syrian dialogue: Iran
- Fresh round of Syria peace talks held in Kazakh capital
Since March 2011, Syria has been gripped by a militancy it blames on some Western states and their regional allies.
UN special envoy for Syria, Staffan de Mistura, estimated in August last year that more than 400,000 people had been killed in the crisis until then. The UN stopped its official casualty count in the war-torn country, citing its inability to verify the figures it receives from various sources.
