Maybe some of these "long tubes" are df-45 with 10 axels. There's even a video of it strolling down a highway. Maybe df-45 hasn't been inducted into the service yet? I remember Chinese military saying that only in-service hardware is shown. Of course, df-45 may have been inducted into the service, but won't be shown
Yankee, Shilao and Ayi said in their paid podcast among other things:
1. In terms of hypersonics, we are likely to see something new and fresh, newer than DF-27
2. In terms of ICBM, we are likely to see something pure silo-based and newer/bigger than DF-41
They liken the new ICBM to be an upgrade to Y-20, and said it's fortunate that DF-41 was paraded in 2019 or else it would be in an awkward position for this year as people would instead be expecting to see the upgraded Y-20A instead. Yankee then said this ICBM is less like a Y-20B in this analogy and more like an An-124.
Shilao said this new ICBM, freed from the constraint of having to be road mobile will be like J-20 making people accept the limitation of J-10.
They joke that they would expect The War Zone to open up a paid account at Guancha and Tyler Rogoway (aka "American Shilao") to host an extra long Bunker Talk for that week.