The heating method of pitaya is warm water soaking. Soak pitaya in warm water of about 70 degrees for 3-5 minutes. It should be noted that the temperature of water should not be too high, which will lead to the loss of anthocyanins and vitamin C, and the pitaya will lose its original nutritional value. Pitaya is a cultivated variety of cactus family, which belongs to measuring ruler. Its fruit is red, long spherical, and its pulp is white and red. It usually ripens in summer and autumn and tastes sweet and juicy.