Phpcms Remove the default auto get keyword, automatically extract the first picture?

Go backstage, Content--Model Management--Manage the model, select the field management of the article model, select the 13th Item--Modify, then remove the 2 checked from the field hint code.
<label><input name= "add_introduce" type= "checkbox" value= "0" checked> whether to intercept content </label><br> <input type= "text" name= "Introcude_length" value= "$" size= "3" > Characters to content summary
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<label><input type= ' checkbox ' name= ' auto_thumb ' value= ' 0 ' checked> get content </label><br>< Input type= "text" name= "Auto_thumb_no" value= "1" size= "2" class= "" > Picture as Title picture

Phpcms Remove the default auto get keyword, automatically extract the first picture?