Tilt the glass at a 45-degree angle and let the champagne pour slowly along the glass wall to reduce the loss of bubbles and prevent overflow. You only need to pour 1 or 1 into the cup for the first time, and you can continue to add it to 2/3 or 3/4 after the bubbles are stable. Champagne is different from red wine, so you don't need to shake the glass violently to avoid releasing too much gas and affecting the taste. Take a sip, and take a proper amount every time, so as to better experience the aroma and taste of champagne.