How to input the verification code of China Petrochemical Company?

China Petrochemical's verification code is a math problem, just enter the answer directly.

1, graphic verification, will give a graphic, and then give four choices, all choices will have letters or numbers, in front of the text, enter letters or words.

2. One is to drag the same picture as the original picture, and the other is to manually type the corresponding number.

3. One is to click on the text of the picture and select the corresponding text, and the other is to select the similar picture above for graphics.