The registration of the second-level constructor exam is in full swing, but some candidates have encountered stumbling blocks when registering. Today, Global Online School will sort out the solutions to the common problems in the second-level constructor exam for everyone. Q: The second-level constructor has a photo signature when registering. I never know how to sign this. I can't upload it. Answer: You can try the following methods and steps: Try using ie browser, or use security software to detect whether there is a plug-in 1 missing, open IE interface and select "Tools"; 2. Compatibility View Settings 3. Check all the boxes 4 that can be checked. Press "f12; 5. Find Internet Explorer86 in "Browser Mode: IEx Compatibility View (X)" and follow the registration process step by step.