HONG KONG—China’s Kaisa Group Holdings Ltd. said on Thursday it wants to extend the maturity of a HK$3.118 billion ($400 million) bond by a year and a half—part of the property developer’s efforts to avoid a messy default and resolve a liquidity crisis. In a filing, Kaisa said it would exchange its 6.5 percent offshore bonds, due Dec. 7, for new notes, due June 6, 2023, at the same interest rate if at least 95 percent of holders accept. Kaisa, which has the most offshore debt among Chinese developers after China Evergrande Group, missed coupon payments totalling HK$689.3 million ($88.4 million) due on Nov. 11 and 12. The payments have a 30-day grace period. Shares in Kaisa, which resumed trading after suspension on Nov. 5, were up 18 percent in afternoon trade with investors cheered by the firm’s attempt to solve payment problems. Kaisa said a sharp downturn in the financing …