29:30 ĸ国å°ç”Œç”Œä»Šå¤©æˆ·Å¤–Ȧ干æ‘É•¿Å•Šéœ²è„¸å£äº¤ç–¯ç‹‚ĸŠä½çˆ†È‰Ï¼Œè¢«Å¤§Å‡ ÆŠŠåŽå…¥ç›´æŽ¥å¹²å–·Ï¼Œæµªå«Ä¸æ– Å–Œæ¬¢è·Ÿä¸åŒçš„Ç”·Äººåšçˆ±