In order to establish a high

Underground liarson office first to solve the radio contact with security xian problem. It was LiuDing and other in xian underground station power is not big enough to 10,305.77 because security in power and electric Taiwan is not a problem, but in the security which is often affected by weather or other factors of interference, cause telecommunications often interrupt or blur.
In order to establish a high quality direct communication, the newly built a liaison office in the basement of a 100-watt fuel generators equipped with high power station, underground command central radio as. Security sent once three, LinQing, etc ShenZhongRen housekeepers, to strengthen the ham there. At that time LiuDing radio only one operator, ye jianying in xian also have their own radio, and only one operator. But the underground offices will equipped with three radio operator just explains the large radio not only, and still huge workload of all-weather work and ensure the xian and security both sides communication of information in any circumstances quickly unblocked, pardonable zhang guotao in memories of the Sian incident happened, said: "if the telegraph poured in xian fly."
In September, ye jianying as the central committee of the communist party in xian resident representative secret. So then, become established underground liaison office in xian to party under the command, also be the first choice in xian after zhou enlai foothold.