How to use mouse and touch screen at the same time（arm qt5.9）

[Jalyn]

On QT 4.8, the mouse and touch screen can be used at the same time by setting environment variables:
export QWS_MOUSE_PROTO="tslib:/dev/input/touchscreen0 mouseman:/dev/input/mice";
But on Qt 5.9 I found that setting the environment variable QWS_MOUSE_PROTO didn't work;
How do I set up to use both the mouse and the touch screen on Qt 5.9, via the TSLIb library;Or what other solutions are needed to support it