Preheat the oven to 170°C.
Take the base out of the fridge. Wrap the cake tin with 2 layers of aluminum foil.
Pour the cream cheese mixture into the cake tin.
Leave the cake tin 2-3 cm above the table. Drop the cake tin down to remove air bubbles. If there are still many air bubbles, use a toothpick to break them.
Use a clean dropper or syringe, and pump some raspberry sauce into it.
Carefully put 2 drops of it on the outer edge of the cake. Continue with this in a circular motion, from the outside to the center. When you get closer to the center, you can drop less sauce to make a smaller circle.
Use a toothpick to carefully drag from the first drop to the last drop slowly and smoothly, from the outer to the inner.
Put the cake tin into a bigger baking pan. Pour around 2 cm of water into it.
Put it in the oven and bake for 25 mins. Close the heat and leave the cheesecake in the oven to cool down. The remaining heat will continue to bake the cheesecake. Remember not to open the oven door in between to avoid a big difference in temperature.
After 2-3 hours, you can open the door slightly, and eventually leave the cake on the counter to cool completely. Leave in the fridge overnight or at least 3-4 hours before serving.
Use a hot towel to clean the knife after every cut to give a clean cut to the cake.