One idea has come to my mind. We know that Df-61 is real and shares the same TEL as df-41. But last year, we saw 10-axel TEL which was huge! some members here even calculated its payload which kinda amounted to what American general said. So, I thought that Df-61 and that 10-axel missile, loikely named df-45 or df-51, were competing designs and pla has decided to go with df-61 which is smaller to eventually comply with the START treaty limits of 800 launchers and 1550 warheads. If PLA had chosen that 10-axel TEL, probably 800 launchers with their warheads would have surpassed the treaty limits.in other words, that TEL was unnecessarily large, and pla chose df-61.