Does this criss-crossed GND plane look like it will function properly?
So I am asking more experienced people if it will definitely not work or maybe it will. Thanks!


This must work by meeting CE safety, Emissions and ESD requirements to function as a Ground Plane.

You should have been given guidelines for ground plane requirements, such as air gap creepage clearances and avoiding sharp edges near grid connected conductors and line filter requirements. 


  Will it radiate 12MHz?  


&lt;  Who knows where this energy gets radiated?    


  Will it pass EMC &amp; Safety requirements?


&lt; unlikely
&lt; not quite meeting creepage and sharp corners near high voltage ( which reduce E-field breakdown voltage significantly).


Sharp corners are known to reduce insulation voltage ( or BDV) down to 1/2 to 1/3 of smooth flat surfaces, which are further degraded by surface dust and humidity according to contamination tables in  IEC 60950-1.

&lt; no evidence of a filter or a rise time or current-limit to the MOV clamp. ( which has limited surge cycles before it expires that may not blow fuse )