The 22-year-old girl will compete in her favourite events, the women's 400m and 400m hurdles.
Qualifying for the event made Huyen the second Vietnamese runner to compete at a world athletics tournament.
It is a deserved reward for Huyen, who rose to instant fame at theSoutheast Asian Games 2015 in Singapore, winning three gold medals andsetting new Games records.
In 2011, Truong ThanhHang became the first Vietnamese to compete at the competition but shefailed to go through to the final in the women’s 800m event.
The championship this year will take place at Beijing, China, from August 22-30.-VNA