Chinese Imari porcelain 18th century Qianlong

Thank you for contacting Mearto. This is a Chinese Imari ware lidded cup. It appears to be hand painted over an underglaze. Thank you for matching the inscription; it is indeed Qianlong. However, it is important to note that many times reign marks on Chinese porcelain are apocryphal: they reference or show reverence to an earlier time period.
I have included links below to examples of authentic Chinese Imari and more recent examples to give you an idea of value. My estimate is contingent on authenticity. I urge you to seek further verification. One way in which you can do this is by submitting images to an auction house such as Sotheby’s, in the portion of their site for prospective sellers.

authentic:

3 plates, $3250
https://www.sothebys.com/en/buy/auction/2019/the-gilded-age-revisited-property-from-a-distinguished-american-collection/a3322177-7cf6-4f00-b744-17fe38d45a87

3 plates, $1875
https://www.christies.com/lot/lot-an-imari-dish-qianlong-4284636/?from=searchresults&intObjectID=4284636

2 plates, $2260
https://www.christies.com/lot/lot-a-pair-of-chinese-imari-dishes-qianlong-5603608/?from=searchresults&intObjectID=5603608

2 lidded bowls, Brit Museum
https://www.britishmuseum.org/collection/object/A_Franks-377

More recent Chinese Imari (several examples with asking prices):
https://vatican.com/Glasses-Cups-Imari/