GUANGDONG is to pay tribute to the chief architect of reform, Deng Xiaoping, this week by holding a seminar on the senior leader's thoughts, the China News Service reported yesterday. The three-day seminar begins tomorrow and comes less than a week before Mr Deng's 90th birthday next Monday. In addition, the province has set up two centres devoted to the research of Deng Thought. And if that isn't enough, a book entitled Deng Xiaoping's Theories and Guangdong's Practice has just hit the streets to mark a ''new fever'' of research into the wisdom of the paramount leader, the official agency said. The book, which was edited by social scientists Zhang Nansheng and Liu Jingcun, also includes a preface by Communist Party politburo member and Guangdong Communist Party boss Xie Fei. Included in the collection of 28 essays are pieces written by the head of the Communist Party's Propaganda Department in Guangdong, Yu Youjun, and the President of Guangdong's Academy of Social Sciences, Zhang Lei. The essays examine the relationship between Guangdong's development and Mr Deng's reform agenda, especially the success of the special economic zones in the province. ''They offer a more systematic analysis of the basic tenets of Deng Xiaoping's [reform] theories . . . and provide some answers to certain hot topics and difficult questions,'' the news agency said. Although there won't be an official celebration for Mr Deng's birthday next week, sources said local authorities in places such as Guangdong and Shanghai were holding events on their own to sing the praises of the leader. Sources said that unlike on his 80th birthday when hundreds of well-wishers went to congratulate him, Mr Deng would likely have a quiet birthday at home because of his deteriorating health.