Function of Tata powder: 1 Neutralize the alkalinity of protein; 2. Help protein to start and make the bubble stable and lasting; 3. Increase the toughness of the product and make it softer. If there is no tata powder, you can use a tablespoon of lemon juice or white vinegar instead.

But as far as my own experience in making Qifeng is concerned, I have never added tower powder. There is no problem that the finished product made by properly stirring protein collapses. It tastes good, too. So there is no need to add it. If you don't trust to put Tata powder, you can use vinegar or lemon juice instead.