Can the yellow code that appears on the trip card when Unicom users connect foreign signals be revoked?

Now green cards are displayed in all cities in China, including Hong Kong, Macao and Taiwan. If you travel to overseas countries and regions, Huang Ka will be displayed. There are no red cards and orange cards at present. The specific definition and judgment rules will be set according to the epidemic prevention and control requirements issued by the government, and will be adjusted in real time according to the dynamic information. If you find that the color card is displayed incorrectly, you can contact the customer service of your operator for verification (Telecom 10000/ Mobile 10086/ Unicom 100 10).