It is a riot that is also called Chinese Massacre, a massacre of Chinese people, took place in October 1740. The Javanese call it Geger Pacinan. This incident was triggered by a regulations issued by the Company against Chinese immigrants that was getting larger and larger. At that time due to lack of job opportunities that caused a lot of unemployment and a practice of collusion in the body of VOC officials, particularly on policies issued against the Chinese. Many Chinese newcomers were unemployed and clustered into mobs in the countryside. Finally, the Chinese began to disturb the peace and robbed in the area near Batavia.
As a result of this human tragedy, Batavian economy suffered a major blow. The departure of Chinese with their expertise, the artery of commerce and industry in Batavia. Once the Chinese could be found in the area of Kali Besar but after this incident they were banned from living within the city walls. A security post was established again in a small fort that was once used to keep watch on the south Molenvliet. The fort was built in 1656 and was demolished in 1729.
Since ancient times the Chinese have paid many visits to Indonesia for trading purposes. In 1620, JP Coen seized and occupied Jayakarta; the Chinese people were welcomed with open arms and in only a year there were already 800 people living in Batavia. Many facilities and concessions were given to the Chinese for living and doing business in Batavia, so that the number of those living in Batavia increased rapidly. The increasing number brought up much unemployment in such a way that many people begin to steal, rob, and kill. This threatened the tranquility of Jakarta and was a threat to the interests, power and authority of VOC or Dutch Company. To overcome this, VOC issued regulations, which were violated by the Chinese causing confusions and after that there was a rumor saying that the Chinese were united and prepared to revolt against the Company.
At that time Chinese mob attacked the west wall of a stronghold of the city at night; the government gave an order to search all Chinese houses in the city. On 9 October, 1740, when weapons searches began, suddenly a house was set on fire and nobody knew the reason, and then things got out of control again. In the rebellion, the Chinese managed to build barricades in the streets, flags and banners reading "Exterminate injustice" or "defend the poor" appeared and scattered everywhere. Buildings and houses were set on fire and the residents began to take refuge until 9 October, 1740. Finally the Governor-General ordered to "eliminate the Chinese in Batavia".
The incident became the basis for the Company to take actions arbitrarily, so that there was a massacre of thousands of Chinese. Then on 10 October, 1740 there was an order from the Governor-General, Valckenier to kill the Chinese who were in prisons and Chinese hospitals, and this led to a massacre in such a way that that Batavia turned into a mess. Many homes and buildings were destroyed, so that for a moment, the economic life and industries that were dominated by the Chinese were experiencing lethargy and even paralysis.
In October of 1740 around 10,000 Chinese died in Batavia. Those who survived fled to Central Java and quickly gained support from Sunan Paku Buwana II, who intended to use them in a fight against the VOC. The event was the responsibility of Governor-General Adriaan Valcknier who was then inspected and detained in Batavia Stadshuis until approximately eight years (1742-1750).