Lee, Will Smith and other crew members work on the filming set.[Photo provided to China Daily]

Lee has been a filmmaker for over three decades, but he says he still has much to learn.

He says making Gemini Man was like going back in time to study new cinematography as someone willing to do what it takes to develop filmmaking.

One limitation of the techniques used in the film is that only 30 screens installed with the Cinity system, developed by Chinese company Huaxia Film Distribution, can release the original 3D, 120-frame version. The number is scheduled to increase to nearly 50 by the end of October and around 100 by the end of 2019.

The current number may seem small compared with the 65,000 screens in urban China.