This method skillfully avoids the restriction that intra-group transactions need to be offset, ensures that income and profit are recognized in the consolidated statement, and achieves the purpose of manipulating income. In addition, some have made use of yin and yang contracts to fabricate income. for example, the public contract stated that the payment for goods was 100 million yuan, but the secret contract stated that the actual payment for goods was 50 million yuan, while the other 50 million yuan was falsely pegged. this inflated income of 50 million yuan, which is very common in related party transactions.