at the end of 1959 nuclear physicist zhu guangya -lsb- 2612 0342 0068 -rsb- left the atomic energy institute and became the deputy director of the nuclear weapons institute , where he assisted li jue -lsb- 2621 6030 -rsb- and wu jilin -lsb- 0702 7139 7207 -rsb- in organizing and coordinating the effort .