You can see the answer in Baidu Wenku, the link is below. (Attached are some instructions) Hope this helps.

In February 1995, the British bank Barings, which had a history of more than 230 years and ranked 489th among the world's 1,000 major banks in terms of core capital, announced its bankruptcy. This news caused a strong shock in the international financial community. . The collapse of Barings Bank was caused by huge losses from the bank's futures trading in Singapore.

In 1992, shortly after Singapore's Bahrain Bank Futures Company began trading financial futures, Leeson, the front-office chief trader (and back-office settlement supervisor), opened the "88888" account. The account opening form stated that this account was the "error account of Singapore Bahrain Futures Company" and could only be used to offset wrong accounts. However, this account was used for transactions and even became a "hiding place" for Leeson to lose money. Leeson made adjustments by instructing back-end settlement operators to make false accounts between the "88888" account and other trading accounts at Barings Bank after the end of each day's trading and before the start of the next day's trading. Through the false accounting adjustment, Leeson reflected that the transactions in other trading accounts of the head office were always profitable, while the losses were covered up in the "88888" account.