2. ① Wash the fish and cut it into 1cm-wide fish pieces. ② Wash the ginger, shred a little, and put it into the fish pieces. ③ Put proper amount of salt, sugar, chicken essence, cooking wine and pepper in turn for pickling (it is best to marinate overnight). ④ Take the egg white and put it in. Stir a little soy sauce and marinate for half an hour

3. ① Add two parts of water, one part of flour and batter according to the ratio of 2: 1; ② Add a little salt and pepper into the batter and stir continuously; ③ Take fish pieces and put them into the batter until they are fully bound and fried in an oil pan until golden brown; ④. ① Add a little base oil to the pan, put the materials prepared in the first step into the pan, add a little salt and soy sauce to stir fry until fragrant; ② Add the fish pieces, and add water just enough to fry them.