2. Add condensed milk into the batter and mix well, then add 1 egg and 5 yolks several times and mix well.
3. Add sugar and salt to the remaining five kinds of protein several times, and stir until dry and foaming. Mix the 1/3 protein paste with the batter, then pour the batter into the remaining 2/3 protein paste and stir well.
4. Put the batter into the mold, gently knock out bubbles, then put it into the oven preheated to 170 degrees and count the second layer from bottom to top, and fire it up and down for 20-25 minutes.