Thank you for submitting your item for appraisal. This appears to be a 1970s Vanguard Studios wall art piece. Vanguard Studios employed hundreds of nameless art students who produced modern art in a production line. One part of the production was sold unter the brand name "Lee Reynolds" but other signatures were also used. This "CHEN" signature shows the same grandeur as the various Reynolds signatures. The estimate is based on similar items sold at auction.