He then went on a mass killing spree and claimed the lives of 17 villagers – including four children and one 72-year-old neighbour.
Reports claim Yang killed the villagers in an attempt to prevent them finding out after his parents’ murders and informing police.
The victims, 11 men and eight women, were members of six families, Xinhua news agency reported.
Their bodies were found on Thursday at different locations in the village, according to a state-backed news website, ThePaper.cn.
Yang, 27, killed his parents after returning to his hometown Yema in China’s Yunnan Province to ask for more money, reports say
A list with the victims’ names circulating online showed four names were minors under the age of 18.
Yunnan officers have verified the list and the news release, Beijing News reported, adding that the police have said there was no link to terrorism.
The Ministry of Public Security sent a working group to oversee the case and manage local authorities in the investigation, reports said.
Video footage circulating online reportedly from the village showed swarms of police and heavily armed officers in fatigues walking the streets and a young man in jeans handcuffed on the ground.