上海黄金回收价格是由市场供求关系、黄金纯度、重量和当前金价等因素决定的。

首先，黄金回收价格受到市场供求关系的影响。如果市场上对黄金的需求增加，回收价格就会相应上涨。相反，如果市场上黄金供应充足，回收价格可能会下降。

其次，黄金纯度也是影响回收价格的重要因素。高纯度的黄金回收价格相对较高，因为高纯度黄金的品质更好，更受消费者欢迎。

另外，黄金重量也是决定回收价格的一个因素。一般来说，重量越大的黄金回收价格越高，因为重量越大的黄金价值也越高。

最后，当前金价也是影响黄金回收价格的重要因素。如果当前金价上涨，黄金回收价格也可能会相应上涨。相反，如果当前金价下跌，黄金回收价格可能会相应下降。

In English:

The Shanghai gold recovery price is determined by market supply and demand, gold purity, weight, and the current gold price.

Firstly, the gold recovery price is affected by market supply and demand. If the demand for gold on the market increases, the recovery price will correspondingly rise. Conversely, if the supply of gold on the market is ample, the recovery price may decrease.

Secondly, gold purity is also an important factor influencing the recovery price. High-purity gold has a higher recovery price because it has better quality and is more popular with consumers.

In addition, the weight of gold is also a factor determining the recovery price. Generally, the heavier the weight of gold, the higher the recovery price, as the value of heavier gold is also higher.

Finally, the current gold price is also an important factor influencing the gold recovery price. If the current gold price rises, the gold recovery price may correspondingly rise. Conversely, if the current gold price falls, the gold recovery price may correspondingly decrease.