CHINA yesterday issued a fresh warning to Britain that Governor Chris Patten's political blueprint posed a challenge to Sino-British co-operation on the handover of Hong Kong and other agreements. Vice-Premier and Foreign Minister Qian Qichen, who will sit down with counterpart Douglas Hurd at a meeting in New York tomorrow night, said that unless the arrangements for next year's elections were settled satisfactorily, the political structure wouldbe revamped in 1997. Mr Qian said that apart from calling fresh elections for the first legislature, the executive authorities would be reshuffled. ''If there is agreement, the people elected [before 1997] can serve beyond 1997,'' he told the Asia Society. According to a China News Service report, Mr Qian said the central issue of his upcoming talks with Mr Hurd was how to ''realise the transition of Hong Kong in 1997''. He described the previous agreement between the two governments, under which members in the Legislative Council elected before 1997 could work beyond the changeover, as a ''creative'' idea. The changes now planned by the British side had brought about ''difficulty''' for that so-called through-train arrangement, Mr Qian said. ''The problem now is that Mr Patten has his own ideas. These ideas have already posed a challenge to the existing Sino-British co-operation and the previous agreements reached between the two sides,'' he said. ''We cannot but have serious consideration [over the previous arrangement for the through-train],'' said the Vice-Premier. Mr Qian, whose meeting with Mr Hurd will take place in the early hours of Saturday (Hong Kong time) re-iterated that Beijing hoped an agreement could be reached. Senior Chinese officials have turned up the heat against London ahead of the ministers' meeting, including the release of an 11-year-old warning from patriarch Deng Xiaoping of a possible early takeover. Also in New York, Mr Hurd was more cautious and expressed hope for ''more progress''. He refused to say whether he was prepared to give in to China but added that it would be useful for both countries to have an opportunity to talk. British Ambassador to Beijing Sir Robin McLaren said he hoped the Hurd-Qian talks would give new impetus to the political talks, entering their 13th round. Mr Patten said he did not think Mr Qian's criticism of him was accurate or helpful. He hoped Mr Qian would address the importance of a fair and credible election during the meeting, which he thought should be the basis of their discussion. He confirmed he would reveal the progress of Sino-British talks in his policy address next week ''without breaching confidentiality'', saying that was what Hong Kong people expected. Mr Patten said his plan to announce the progress of the talk was an attempt to satisfy the aspirations of Hong Kong people during this ''marathon'' negotiation. ''I'll take Hong Kong people in a reasonable way into the confidence without risking the talks on the 1994/95 electoral arrangements,'' he said. ''My feeling about public opinion in Hong Kong is people don't think a bad agreement would be acceptable. ''And if we can't get a good agreement, I think people would expect us to get on and do things ourselves,'' he said.