Chinese national Qin Wu, 37, was allegedly the unintended victim in a fight that broke out in the makeshift temple with a shady past in Guildford.

Police allege Mr Wu was shot in the chest at the property in Kennedy Street on February 1, when he intervened in an argument between a friend of his and a group of men.

It is believed another person was also shot during the late-night confrontation, but he did not go to hospital for treatment.

Police believe he may have shot himself accidentally.

On Monday, detectives arrested two men over Mr Wu's death.

A 45-year-old man was arrested early in the morning at a house in Croydon Park.

The other man was arrested at Silverwater jail.

Both men were charged with murder and shoot with intent to murder and are expected to appear in court on Tuesday.

Police say further arrests are expected.

In April, homicide detectives revealed the Guildford house had been converted into a Buddhist temple at the time of the shooting.

It was visited by many people throughout the day and was also a hive of drug activity.

"It is possible Qin may have been shot when he intervened in an argument between his friend and a group of men who arrived during their visit at the house," Detective Sergeant Justin Moynihan said.

"We believe at least two people left the house after the shooting and returned a short time later with a third person, but they weren't on scene when police arrived, neither was Qin's friend."

Another man, Ting Huang, was stabbed to death at the same property in 2014.

Zhen Fang, 38, was found guilty last year of murdering Mr Huang, his former friend, after he admitted taking "a lot of ice".

Fang wrapped Mr Huang's body in a doona and stuffed it into a car boot before parking the vehicle near Rookwood cemetery in Lidcombe.

Mr Huang's decomposing body was found in the car weeks after he was murdered.

Fang has been sentenced to a minimum of 14 years' jail for the murder.