MARKET diversification and improved productivity helped boost the net profit for Great Wall Electronic International, which posted a 20.9 per cent rise to $48.56 million for the six months to September 30. Earnings per share were up 10.6 per cent to 5.2 cents. The directors have recommended an interim dividend of 1.5 cents per share, compared with two cents previously. Turnover jumped 20.9 per cent to $1.56 billion, while the operating margin grew to 4.4 per cent from the previous 3.9 per cent. 'The growth in the current period's turnover was attributable to both the increase in sales of colour television sets and the successful diversification of the group's products into the worldwide markets,' said chairman Chiang Chi-kee. Sales of large-screen televisions in China staged particularly prominent growth, he said. He attributed the rise in operating margin to mastering of basic technology and to cost savings achieved from the first phase of the group's consolidation, which led to productivity improvement.