Pork Knuckle Rice Pork Knuckle Rice. Basically 0 cost for 5u. Go to the contract interface, click on the three dots in the upper right corner, click on the contract trader challenge, and sign up for the competition.
Completing the third and fourth tasks can earn you a 5u trial fund, which is equivalent to u and can be spent or withdrawn.
The transaction volume tasks have wear and handling fees, hard brushing is not very cost-effective; just complete two simple tasks to earn 5u. Those with strength can do all of them. Please note that tasks completed on the same day will refresh the next day.
Note: Some friends mentioned that this trial fund has bugs, so everyone should just benefit without trying to artificially inflate transaction volume. See detailed comments for more information.