The mother of missing autistic teenager Yu Man-hon was last night camped outside government headquarters. Yu Lai Wai-ling said she would not leave until security chief Regina Ip Lau Suk-yee agreed to meet her. The boy's parents had earlier been offered, but rejected, meetings with security officials, demanding instead to see Chief Executive Tung Chee-hwa or Ms Ip because they were the only ones capable of helping them. Mrs Ip was said to be too busy yesterday and officials last night urged Mrs Yu to go home, saying 'appropriate arrangements' would be made today. The boy's father, Yu Pui-lam, returned home. The couple had petitioned the Chief Executive to renew government efforts to find their son, who has been missing on the mainland for nearly eight months. Mr Tung insisted the Government was still trying to find Man-hon when he accepted a letter from the couple at the Central Government Offices. However, a spokesman for the Security Bureau said there were no plans to renew government funding to pay for advertisements in the search for 16-year-old Man-hon, who disappeared after crossing the border on August 24. Mrs Yu said: 'Mr Tung said they were thinking of ways to help and it was difficult. I told him that we knew it was difficult and that's why we were looking for him. 'We wanted to talk to Mr Tung as there is no action taken every time he says he will ask someone to follow up on our petition.' She said she wanted the Government to set up a team to co-ordinate efforts to look for her son on the mainland and continue to fund advertisements in mainland media. The Security Bureau granted $200,000 to run advertisements last November but the appeal stopped recently after all the money was used up. The couple said they had not given up hope of finding their son, who crossed the Lowu checkpoint without travel documents after running away from them on August 24 at Yau Ma Tei MTR station. Shenzhen security officials, who intercepted the teenager, asked SAR immigration officers to verify his identity - but he was sent back to the mainland after it could not be confirmed.