How was the passionate scene between Deng Chao and Jackie Lui filmed under the scorching sun?

In fact, the director has given the answer in an interview.

The following is the official answer given by the director.

Cao Baoping:

I didn't shoot this scene the first night. The next day, before shooting, I told the actors that since we were going to shoot, we should be true, not evasive or secretive. Deng Chao is also very professional, and we specially invited a gay friends on-site instructor. We talked together for a long time, including whether to leave the field or not. To what extent? These are technical and professional discussions, as well as creative struggles and competitions.

Later, we discussed that the process of detachment may be more interesting and reasonable from the plot, because Deng Chao's affair with homosexuality was discovered by Duan Long all the way. We only shot three scenes in this scene, all of which were very good. The photographer is holding the camera, and one person is carrying the machine. He is close to the two actors and can't wait to hear the tiny heartbeat. It is very detailed and difficult.

The photographer was sweating after filming, saying that the feelings between two men had never burned me like this, and everyone was very involved. Everyone is in good shape, and this scene is a feeling of love. The screenshots taken out of context by everyone are too wronged by the creator and failed to live up to a good play.