I have just tried opening PCBv1.00 in: <https://easyeda.com/project_view_Just-learning_ekQ82kCTN.htm> and could not see any ratlines. Have you solved the problem or could this be an issue with different browsers rendering in different ways? BTW, I noticed you had done the copper floods using many overlapping drawn areas. You can do that much faster by using: <https://easyeda.com/Doc/Tutorial/PCBDesignEditor.html#h.gamwefd9p0g> to draw an overall copper area and then you can make cutouts in the copper like this: <https://easyeda.com/Doc/Tutorial/ThelatestupgradeofEasyEDA.html#h.ubs94xpocqt1> You can use this method to make slots in the PCB itself too: https://easyeda.com/bbs_view_1300.htm

Hi, Thanks for your open projects. So we can check them and give a help. In you `Vehicle Sensor v1.01` PCB, I can't find any bad Ratlines , this PCB is Cool, hope you like to order a PCB from Us.  In your other PCB,  You may make two small mistake in this PCB 1. You would better use Copper area to build a Gnd copper. Not Solid Regin. Check andy's comment above. 2. you would better add a track to connect the via, or the pad can't connect the bottom area. this is my demo, check it out <https://easyeda.com/editor#id=S3XfxrJ1j>