A Beijing sex culture exhibition which opened on Sunday and was set to run for a week was abruptly closed yesterday. All items on display came from the private collection of Ma Xiaonian, deputy chairman of the Beijing Sexuality Education and Research Association. 'I really don't know why they terminated the exhibition,' said Mr Ma, who has collected sex-related objects since 1993. However, Gu Shengli, a spokesman for the Beijing Municipal Commission of Population and Family Planning, said it had not ordered the closure of the show at a family planning centre in Shijingshan district. 'As far as I know, we haven't given the exhibition an official termination order,' he said. The exhibition was originally only intended as an educational service for family planning organisations. But on the first day it attracted many curious passers by, including what state media reports described as 'less-educated people'. When they were refused entry, some people, including teenagers, tried to break in to the centre. Organisers eventually allowed some visitors to enter, making the display Beijing's first public exhibition about sex culture. Zhu Qi, vice-president of the China Sexology Association, said the event was terminated by the local family planning and cultural relics bureaus. Zhang Jiujiu, secretary-general of the Beijing Sexuality Education and Research Association, said: 'I think Beijing is still not ready for such an exhibition. Organisers should set limits on who can visit, as this kind of show probably means more to researchers than to ordinary residents.' Organisers also covered up the more sensitive parts of some exhibits before the closure. One object on show was a stone sculpture of male genitalia that dated from the late New Stone Age.