On August 13, 1939, the Japanese Army occupied Shenzhen and blocked Hong Kong. On August 13, 1939, the Japanese Army cut off the Chinese Army's supply line, ordered the Eighteenth Division to assemble Shenzhen, prepared to attack Shenzhen, and notified the British authorities not to interfere with Japanese operations. On the evening, the eighteenth Division Division Division Division Tiger launched, and the next day morning landed near Baoan. The Shenzhen First Fifth Division and the First Fifth Division did not retreat, and the Japanese Army had no resistance to occupy Shenzhen, and on August 15, occupied a sandy corner. On August 23, more than 1,600 Japanese troops assembled and threatened Hong Kong. The Hong Kong authorities were