Updated at 4.04pm: Beijing has given the green light for mainland carriers to raise domestic air travel prices, following its decision to impose additional fuel charge on air tickets. The move ends year long freeze on ticket prices, the Shanghai-based Shanghai Morning Post reported on Monday. China Aviation Administration of China (CAAC), the mainland's aviation industry regulator, issued a statement earlier late last week to allow mainland carriers to charge an additional fuel fee on the air tickets from November 1. CAAC said the airlines could raise the ticket prices within the 20 per cent upper limit or 150 yuan at most on the domestic tickets.? The regulator also requires mainland carriers to first register price adjustments with the CAAC and give the public seven days notice prior to implementation of the price adjustments. The move is in a bid to ease the financial constraints suffered by the mainland carriers, which have been badly hit by the seven fuel price hikes in less than a year. Aviation fuel prices on the mainland rose 61.5 per cent to 3230 yuan per tonne in September from 2000 yuan a tonne a year earlier. According to statistics from CAAC, fuel expenditure accounted for 31 per cent of the mainland airlines' total operational costs in the first six months of the year, up 9 per cent from a year earlier. Consequently, the mainland aviation sector reported an extra fuel-related expenses of 1.27 billion yuan in the first half of the year.? According to China Aviation News, the industry posed a combined net loss of 560 million yuan right on the back of heavy expenditure during the first half, while it reported a net gain of 790 million yuan in 1999. But the price fluctuations on the international market are not the sole reason for the hardship suffered by the mainland airlines. ? Earlier in August, China Aviation Oil Supply Company, the sole aviation fuel supplier on the mainland was under heavy fire over much higher fuel prices it charged on the airlines and its price monopoly on the domestic market. The mainland airlines complained that the domestic oil prices are still abnormally higher compared to the international market and accused China Aviation Oil suppliers of exploitation. China Aviation Oil Supply has claimed it was also a victim of the skyrocketing oil prices on the world market because more than one quarter of its supply comes from overseas.