If ICBC has been using it for six months and the comprehensive score reaches the standard, you can apply to increase the fixed limit. Normally, it can be increased by 20% to 50% at a time, up to 100%. That is, your 2,000 limit can only be increased at one time. It can be increased to 4,000, and if the conditions are met, it can be increased to 8,000. It will take at least 3 years to increase to 50,000.