Malaysia's durian is ripe on the tree, meaning that it must wait until fully mature, naturally fall off, and then pick up in the pre-arranged network to transport to the market for selling. The whole process doesn't need to promote ripening of durian. Notice that  Bee b. farm’s Malaysia's durian was picked up, not taken off. That's why all of our Malaysian durians arrive in Hong Kong by air from the farm within 24 hours to ensure freshness.