The group's appeal to the public comes after China Central Television reported that restaurants in hilly Zixi county, Jiangxi province, had State-protected wild animals on their menus, including macaques, badger pigs, Chinese bamboo rats and wild geese.
Footage from CCTV on Tuesday showed monkeys were killed illegally on mountains and sold at farmers markets, or gruesomely slaughtered and served in several restaurants.
Monkey meat can sell for 560 yuan ($90) per kg, while monkey brain can fetch 1,600 yuan per kg, according to the report.
On Wednesday, two men were detained, and authorities said more arrests were possible as the investigation continues. Four officials, including the county's forestry bureau chief, have been sacked.
On the same day, authorities in Guangdong province said more than 1,300 restaurants and hotels and 102 people involved in poaching, transporting and trading migrant birds and other wild animals have been punished.
Memorial service held for China's fighter jet production head