Jury members overseeing the trial for Yanfei Bao's killer-accused have been asked to check their availability into December

Tingjun Cao is charged with the Christchurch real estate agents murder in July last year - her body remaining undiscovered for over a year.

He is running his own defence - with disruptions from questions being ruled not permissible and repetitive.

Justice Preston says she's concerned at the real possibility the trial could extend beyond six weeks, and into a seventh.