Really? could you please share this image showing no. 171??
By my information Batch 01 was the J-10C and the first J-10C batch was in fact Batch 02 with cn. 0275 being the highest number spotted.
So indeed, that Batch 02 was substantially (76 ac) larger but from all I know and based on the number of units converted it fits quite nicely, the regular size is about 40 per batch, so that there are now 76 Batch 02 plus 40 each within Batch 03-07 (=5x 40 = 200) ... so roughly 270+ J-10C, but surely not 700.
IMO clearly wrong and faked!