RACISM? Disrespectful Chinese signage at boarding gate 52 in Melbourne airport T4

I flied with Jetstar on 7 Nov from MEL to LST. I found a Chinese (only Chinese, no English and other languages) signage at gate 52 in T4 Melbourne airport. The signal means "do not use mobile phone between gate and aircraft". Jetstar logo is under this signage. I took a photo as evidence. I wonder is there an investigation shows Chinese people are the most people who use mobile phone between gate and aircraft? Jetstar earns Chinese people's money and did this awful, disgusting thing. Conscience of the staff who made this signage was eaten by dog. Shame! Shame! Shame!