There has been rumor that P1 gets China to build everything for them ever since MMC ceased providing rebadge. The Saga, Persona/Gen2, Preve, Exora materials, stamping/molding machines, tech provided by China carmakers. You just have to pay China carmaker, telling them what design you want and they will provide you the machines to build the cars and information on material mixture.

Also, survival in crashing is higher than getting slammed at. Cars nowadays are made to pass frontal collision, rollover and side collision. This incident has nothing to be shout of. Mazda and Ford instead have encountered much riskier accident by getting slammed by semi-trucks that lost control at high speed. The Preve roof cave in showed it scored average.

Your rumours dont have any substance at all. Saga/Exora/Savvy consultant: LG Korea, Persona/G2: Lotus Engineering. Waja: EDAG Germany, Preve: MAGNA Austria. China suppliers is just another suppliers and they produce for VW, GM, Ford as well (mostly MNC tier 1 like Lear Corp, TRW, Bosch, Hella, Valeo etc)

In fact Its China OEM is trying to get technical assistant from Lotus & Proton as in the case of Youngman

Everybody in the industry knows this and LG V-ENS (https://www.v-ens.com/eng/main/default.php) even design the Toyota/Daihatsu/P2 car  for Boon Luminas