Of course not. You can buy as many hands as the system accepts. But as far as I know, at present, the largest volume of domestic trading system (exchange trading system) is 9999 lots.

For natural person customers and natural rubber varieties, generally, the monthly position shall not exceed 5% of the total position; There are 300 lots before the delivery month, which means that your maximum order quantity cannot exceed 300 lots only one month before the delivery month; The delivery month is 100 lots (not applicable to individual customers here, only applicable to enterprise users).