Top hotels at the famous Sun Moon Lake in central Taiwan are promoting packages to attract domestic visitors, as international airfares are increasing this summer, officials said Tuesday. While some 720,000 Chinese tourists visited the attraction during the first half of this year -- more than last year's total number of tourists from China -- officials of the Sun Moon Lake Scenic Area Administration said domestic visitors are also increasing. The officials said Taiwanese visitors have shown a preference for themed or in- depth tours, with themed packages being particularly popular, and two five-star hotels in the area have been keeping up with the trend. Sherry Chen, assistant general manager of the Lalu, said the hotel has invited an Indian yoga and spiritual healing specialist to design a course using the hotel's swimming pool amid the summer heat, adding that the course includes water yoga for couples, which is rare in Taiwan. Meanwhile, Wayne Ho, general manager of the Fleur de Chine Hotel, said the hotel has turned itself into a summer theme park with activities including water zorbing and bungee trampolining, and will hold a three-day drama camp for elementary school children in August. 