The Brazilian forward has been accused of punching a Guizhou Zhicheng assistant and his club want to see evidence of the claim
Guizhou Zhicheng called on Shanghai SIPG to publish evidence and "let the truth be known" after allegations Hulk punched a staff member on Saturday.
Li Bing, the outgoing coach of Guizhou, accused Hulk of punching assistant Yu Ming in the tunnel during Shanghai's 3-0 win.
Shanghai SIPG and Hulk have denied the incident, but in a statement on Monday, Guizhou called for action.
"We earnestly request that a higher authority take this matter seriously," the statement read.