The Canada special line is completely different from the slow line we were using (grouping big parcels, shipping to CA warehouse, transiting by 2 different countries).
Canada specia line is a direct line China Canada, same principle like EU and australia special lines, it has a customs risk like China Post or more, it's 4 weeks average, tracking is provided same week after payment, and it's considered a reroute line since the freight forwarding company bears the customs risk on the buyer, but the risk still exist regarding frequency of inspections.
It's a line were using long time ago in meso, but because of high inspection I made it with no reship policy, but now it requires 20% extra to be eligible for reship since I won't be accepting orders via the secure line anymore because of long eta and complaining customers.