周律师:您好!我公司与某贸易公司达成了总价为100万人民币的口头协议,约定由其在半年内供应我公司某种原材料。为此,我公司支付了30万元定金给某公司,双方同时约定了违约金。两个月后,某公司以原订合同价格过低为由要求加价并提出,如果我公司同意加价,双方立即签订书面合同。否则,他们将不认可双方之前达成的口头协议。请问:双方之前签订的口头协议是否具有法律效力?如果该口头协 Zhou Lawyer: Hello! My company and a trading company reached a total purchase price of 100 million yuan verbal agreement, agreed by its six months of supply of certain raw materials company. To this end, my company paid a deposit of 300000 yuan to a company, both parties also agreed a liquidated damages. Two months later, a company asked for a fare increase on the ground that the original contract price was too low, and if my company agreed to increase the fare, the two parties signed a written contract immediately. Otherwise, they will not recognize the verbal agreement reached by both parties before. Excuse me: Is the oral agreement signed by both parties legally effective?