Many people have had the unsettling experience of their mobile app health code being of the wrong color. Now, help is on hand.Residents can lodge an appeal and submit proofs, such as a hospital discharge certificate, if their&\\;nbsp\\;suishenma&\\;nbsp\\;health code shows the wrong colors, according to the Shanghai Big Data Center.They can dial the city's service hotline 12345 or make an online appeal on the&\\;nbsp\\;suishenban&\\;nbsp\\;app, where they can check the reason for the red or yellow health code, said Liu Yingfeng, deputy director of the center.