Disturbing video footage showing a 23-year-old being stabbed 40 times by her ex-girlfriend after she fell from a balcony while trying to escape her has been played before a Sydney court.
Zixi Wang, 30, has pleaded guilty to murdering Shuyu Zhou after she was found with critical injuries on a footpath at the back of an 11-storey unit block in Zetland in June 2019.
In the Supreme Court on Monday, Ms Zhou was seen on CCTV footage rolling around on the ground, defenceless and unable to stand up after falling five floors from the balcony.
Soon after Wang catches an elevator down to the lobby and walks around the front of the building, crouching down and pulling at Ms Zhou's arms and clothes.
Wang retreats inside while a pedestrian stumbles across Ms Zhou and immediately telephones emergency services detailing her location and condition.'
As he is calling triple-zero Wang returns in a fresh pair of pants and pulls a knife out from her jacket.
Wang then repeatedly stabs Ms Zhou who tries in vain to push her and roll away.
"Quickly....right now she's being attacked," the witness says.
"I'm going upstairs. I'm a bit worried myself."
While Ms Zhou was "substantially immobilised" she was stabbed 40 times and had 18 incision or puncture wounds.
Crown prosecutor Christopher Taylor said Wang's murderous intention was evident in her slashing motion and by drawing the knife across Ms Zhou's throat multiple times.
When significant blood flowed from Ms Zhou's jugular vein, Wang fled and hid the knife in a raised garden bed.
"This attack was no less than savage, no less than cowardly, and it was undertaken without any hesitation," he said.
He pointed to Wang intermittently stabbing her victim and standing back to assess the effectiveness of her continual attack, saying this was no frenzied attack or loss of self control.
At one point inside the elevator Wang checks her appearance in the mirror and fixes her hair.
Ms Zhou's mother Li Wang sobbed throughout her victim impact statement, saying her heart feels like it has been stabbed "40 times", the pain so severe her life now feels unbearable.
"I'm living my life as good as dead...But I still have to live on," she said.
"I just want to ask the murderer how could you be so merciless? What on earth are you, a human being or a devil?"
"I'm hoping to see the day the murderer gets the justice she deserves."
She said her daughter was kind, healthy, beautiful and enjoyed helping people.
Defence lawyer Tony Bellanto QC said Wang had been unable to accept their relationship ending and had slipped into a deep depression in the months before the attack.
"The deceased had cut off all contact from the offender... and these matters were exacerbated... when the deceased commenced a relationship with a mutual friend," he said.
Ms Zhou's blood was found in her kitchen, living room and sliding door frame, before she tried to escape by climbing over the balcony railing.
Wang sustained one minor injury from a bite mark to her cheek.
Justice Robert Beech-Jones is due to hand down his sentence on October 1.