If you enrol to Finnair Plus today, you will reach Silver tier after flying just one return flight to Asia with Finnair in Business Class or with a PRO family ticket.
This offer is available on scheduled Finnair flights to Asia in eligible booking classes.*

Starting from 0 a FCO-HEL-TYO/HKG/SIN return in C earns 45k points, which takes you over Silver already before the last leg. BKK and the others are just below this treshold, so I see this as more of a marketing campaign than a status fast track promo.

True, Plus tix earn only 31k on these routes so it's an "expedited track" for those pax.