I think people are really starting to over-analyse these frames... It's the inside, it does not have to be perfect. Just check if the carbon is not too thin in that place (tap it, push it... )
It's a 500EUR frame for god's sake...

another clue can be the weight, no doubt that EPS molding save the weight (one big layer is better than several small layers), more than 100gr for sure

but if i compare to western compagnies , i have some questions.
For example canyon is famous to build the thinnest (and fragilest) frames (the process is pretty optimized), the ultimate  frame is given for 1050gr(cf), 850gr(slx), 730gr(cfr). if we ignore the CFR which use expensive HM M... carbon fiber, i wonder how can OEM chinese factories  reach these weights with thicker frames (even by using EPS molding). Giant TCR is around 850 gr too, maybe helped by the slopy frame.

With my short knowledges, i understand the following facts: 
high modulus means same stifness than low modulus with less material, less weight but fragiler due to a smaller tensile strength
T800 and T1000 show the same stifness but T1000 is 10/15% more robust and 10% denser
T700 is 20% less stiff than T800/1000 too but slightly more robust than HM carbon fiber
T800 is at least 30% more expensive than T700

So how can chinese OEM factories produce the same weight than a slx with ticker frames, with probably the same fibers (not the same supliers or/and coating), and with a less controlled distribution of fibers? i use to say to an friend who is astronomer: dark matter takes place within chinese carbon frames but weight is missing.

how do you connect DI2 FD to the battery without drilling an hole?

Details ==> see Pictures
Frame: Size 54 cm
Groupset: Shimano 105 di2
Wheelset: "50×28mm tubeless Wave Wheel Ceramic Titanium hub 54T center lock Carbon spoke" on their website ; titanium hubs ; Carbon spokes ; Matt finish ; ≈≈1305G

Pricing:
TT-X68 Bike Shimano R7170 Groupset/carbon wheels
HB068:110*400mm 54cm black matte                                          US$2,289.00
Saddle SD4000 (bought 2 saddles Sd4000 and sd 2000)                 US$59.00
Extra carbon spokes+nipples     10 pieces                                      US$60.00
Total                                                                                           US$2,408.00
Shipping By DPD                                                                          US$280.00
PayPal Fee 5% commission on total orders                                     (US$132.00)
Grand Total                                                                                 US$2,820.00
I paid                                                                                          2729 EURO         
!!exchanged by my Bank (2% fee) (Paypal has rly bad exchange rate)!!
will also go for custom painting "white chameleon"                       +  90dollar


PayPal Fee 5% commission on total orders for (Protection)  ---> !!U can dodge this by paying ( family and friends option) but u loose protection!!

Hello Leon, can I ask what is the difference between the YHM and YAM line of MTB wheelsets? Should/ can I match between the two, or stick to either one only?

You mean the minimum insert into Frame?