The emphasis of red colour in chinese culture originated from the han-chinese culture's veneration towards red colour. The red color wards off anything evil, red is auspicious. This view had already began in pre-historic times. Red was the colour of the sun (symbolizing power), the colour of blood (life) and the colour of fire (used against beasts, symbolizing warmth/celebration). As time passes by, this veneration for red colour did not change. In the ancient marriage custom of han-chinese, one must wear red clothings, red head-scarves, burn red candles. In any occasion, people uses 'red' color to increase the atmosphere of 'celebration' and 'happiness'. Han-chinese regarded red as a colour symbolizing celebration, success, loyalty, bravery and righteousness. Of particular feature is that red is viewed as a colour that wards off evil.
That's the reason why in occasion of celebration such as chinese new year, chinese marriage, 60th year birthday banquet were red colour used.